{"id":5315,"date":"2025-01-21T11:02:56","date_gmt":"2025-01-21T10:02:56","guid":{"rendered":"https:\/\/seefbv.com\/en\/?post_type=docs&#038;p=5315"},"modified":"2026-07-02T14:44:53","modified_gmt":"2026-07-02T12:44:53","password":"","slug":"what-is-chromium-6","status":"publish","type":"docs","link":"https:\/\/seefbv.com\/en\/docs\/what-is-chromium-6\/","title":{"rendered":"1. What is chromium-6?"},"content":{"rendered":"<div class=\"post-content clearfix\"><h1>What is chromium-6? Explanation, risks, legislation and testing<\/h1>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Chromium-6, also written as Cr(VI), is an oxidation state of the metal chromium that has been useful in industry and engineering, but is also known as a carcinogenic hazardous substance. Workers can become ill from it if they work with it without sufficient protection. Source: <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/www.rivm.nl\/chroom6\">RIVM<\/a><\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">On this page you can read in plain language what chromium-6 is, where you encounter it, what risks it poses, what the law requires and how you can have it investigated and managed in a reliable way. We link this to the practical services and products of SEEF and refer to official standards and methods.<\/p>\n<h2>1. What is chromium-6?<\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Chromium is a metal that can occur in different &#8220;forms.&#8221; These forms are called oxidation states. Chromium-6 is the oxidation state in which chromium has six positive charges, which is why we call it Cr(VI). Source: <a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/en.wikipedia.org\/wiki\/Hexavalent_chromium\">Wikipedia<\/a><\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Key points:<\/p>\n<ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\">\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Chromium-6 almost always occurs as a chromium-6 compound, for example as chromate or dichromate.<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">It is never present as &#8220;loose&#8221; chromium-6 in a material, but is bound to other substances, such as zinc, lead or calcium.<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">These compounds often provide good corrosion protection or are a good and stable pigment such as lead chromate (yellow), but can also pose significant health risks.<\/li>\n<\/ul>\n<h3>Short simple explanation<\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">You can think of chromium-6 as an &#8220;aggressive mode&#8221; of the metal chromium. In this state, it reacts much more easily with other substances. Inside the body it then converts to the more stable form chromium-3 (Cr(III)). It is precisely this reactive property that can cause damage to cells and DNA.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">More background on the chemistry of Cr(VI) can be found in our articles:<\/p>\n<ul>\n<li>\n<p class=\"p1\"><a href=\"https:\/\/seefbv.com\/en\/docs\/cr-vi-formation-in-insulation-high-temperatures\/\">The formation of Cr(VI) in insulation at high temperatures<\/a><\/p>\n<\/li>\n<li><a href=\"https:\/\/seefbv.com\/en\/docs\/oxidation-cr-iii-to-cr-vi-explained\/\">Oxidation of Cr(III) to Cr(VI) explained<\/a><\/li>\n<li>\n<p class=\"p1\"><a href=\"https:\/\/seefbv.com\/en\/docs\/reduction-of-crvi-to-criii-explained\/\">Reduction of Cr(VI) to Cr(III) explained<\/a><\/p>\n<\/li>\n<\/ul>\n<h2><b>2. Where do you find chromium-6?<\/b><\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Chromium-6 is best known from:<\/p>\n<ul>\n<li>\n<p class=\"p1\"><strong>Old paint systems and coatings<\/strong> on steel, concrete and wood, for example bridges, railway bridges, fences, vehicles, military objects, but also on window frames, windows and doors of residential buildings.<\/p>\n<\/li>\n<li>\n<p class=\"p1\"><strong>Corrosion-resistant primers<\/strong> and paint layers in, among others, aviation and industry; strontium chromate has been widely applied on aluminium surfaces.<\/p>\n<\/li>\n<li>\n<p class=\"p1\"><strong>High temperature applications<\/strong>, such as insulation around gas turbines, CHP installations and other process installations, where Cr(VI) can form through a reaction between chromium in steel and calcium-containing insulation. But also in waste incineration plants, biomass power stations or other combustion installations where alkali and alkaline earth metals may be present.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Welding and grinding activities on stainless steel or high-alloy steel, where chromium-6 can occur in welding fumes and grinding dust.<\/p>\n<\/li>\n<\/ul>\n<p class=\"p3\">In our knowledge base category all about Cr(VI) compounds you will find more detail on applications, including in:<\/p>\n<ul>\n<li><a href=\"https:\/\/seefbv.com\/en\/docs\/crvi-in-paint-and-coatings\/\">Cr(VI) in paint and coatings<\/a><\/li>\n<li><a href=\"https:\/\/seefbv.com\/en\/docs\/cr-vi-formation-in-insulation-high-temperatures\/\">The formation of Cr(VI) in insulation at high temperatures<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><b>3. Why is chromium-6 dangerous for our health?<\/b><\/h2>\n<p class=\"p3\">All chromium-6 compounds are classified by the International Agency for Research on Cancer (<a class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0273230021001860\">IARC<\/a>) as <strong>group 1: carcinogenic to humans.<\/strong><\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Important health effects mentioned in research:<\/p>\n<ul>\n<li><strong>Lung cancer<\/strong> from prolonged inhalation of chromium-6-containing dust or fumes<\/li>\n<li><strong>Nasal and paranasal sinus cancer<\/strong><\/li>\n<li><strong>Asthma and other respiratory complaints<\/strong><\/li>\n<li><strong>Skin problems<\/strong> such as skin irritation and allergic contact eczema from skin contact<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<div class=\"_chunkWrapper_6ta1u_30\">\n<p class=\"font-claude-response-body break-words whitespace-normal\"><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"0\">The risks depend among other things <\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"37\">on:<\/span><\/p>\n<\/div>\n<ul>\n<li>\n<p class=\"p1\"><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"0\">The <strong>concentration<\/strong> of chromium-6 in <\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"35\">the air or on the surface<\/span><\/p>\n<\/li>\n<li>\n<p class=\"p1\"><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"35\">The <strong>duration <\/strong><\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"74\"><strong>and frequency<\/strong> of exposure<\/span><\/p>\n<\/li>\n<li>\n<p class=\"p1\"><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"74\">The <strong>route of <\/strong><\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"113\"><strong>exposure<\/strong>: inhalation, skin contact or <\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"151\">ingestion<\/span><\/p>\n<\/li>\n<li>\n<div class=\"_chunkWrapper_6ta1u_30\">\n<p class=\"font-claude-response-body break-words whitespace-normal\"><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"151\">The <strong>protective measures<\/strong> that <\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"190\">have or have not been taken<\/span><\/p>\n<\/div>\n<\/li>\n<\/ul>\n<p class=\"p3\"><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"0\">RIVM and <\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"9\">other authorities provide extensive <\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"45\">information about diseases associated <\/span><span class=\"_animating_6ta1u_10\" data-newtext-seq=\"83\">with chromium-6.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>4. Legislation and limit values for chromium-6<\/b><\/h2>\n<p class=\"p3\">In the Netherlands, chromium-6 has been designated as a carcinogenic substance. Employers must comply with strict requirements from, among others, the Working Conditions Decree and regulations on hazardous substances. Because it is a carcinogenic substance, additional rules apply that employers must comply with. The Netherlands Labour Authority also actively enforces these rules.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Key points:<\/p>\n<ul>\n<li>\n<p class=\"p1\">The statutory limit value for chromium-6 compounds in the breathing zone of workers is <strong>1 microgram per cubic metre (1 \u00b5g\/m\u00b3) as an 8-hour TWA<\/strong><\/p>\n<\/li>\n<li>\n<p class=\"p1\">In the European Union a less strict workplace limit value of 5 \u00b5g\/m\u00b3 applies, but in the Netherlands the lower, stricter limit value is leading. The amendment in the European Union came into force on 17 January 2025, but had been announced years earlier. This can be found in <a href=\"https:\/\/eur-lex.europa.eu\/legal-content\/EN\/TXT\/PDF\/?uri=CELEX%3A32017L2398\">Directive 2017\/2398<\/a><\/p>\n<\/li>\n<li>\n<p class=\"p1\">Chromium-6 compounds are classified under the European CLP Regulation as <strong>carcinogen category 1A or 1B<\/strong><\/p>\n<\/li>\n<li>\n<p class=\"p1\">Under REACH and ECHA, an increasing number of applications of Cr(VI) are being restricted or completely banned, with a further tightening trend towards a total ban for many applications.<\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p class=\"p3\">In addition to complying with limit values, employers must, in accordance with the occupational hygiene strategy (STOP strategy) and the rules on responsible commissioning, assess whether materials contain chromium-6 and what control measures are required. Our own dataset shows that chromium-6 compounds are present in as many as 42% of existing paints and coatings. Everyone working on existing coatings must therefore include in their risk assessment that exposure is possible, which also leads to an obligation to investigate.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">In our knowledge base you will find a separate page on:<\/p>\n<ul>\n<li>\n<p class=\"p1\"><a href=\"https:\/\/seefbv.com\/en\/docs\/totaal-crvi-verbod-onder-echa-restrictie-2025\/\"><i>Totaal Cr(VI) verbod onder ECHA restrictie (2025)<\/i><\/a><\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><b>5. How can you be exposed to chromium-6?<\/b><\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Employees can come into contact with chromium-6 in various ways:<\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Inhalation of dust or fumes<\/strong><\/p>\n<ul>\n<li>Sanding, grinding or blasting (processing) of old paint layers.<\/li>\n<li>Welding or cutting stainless steel or chromium-containing steel.<\/li>\n<li>Working on hot installations with Cr(VI) formation in insulation.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"p1\"><b>Skin contact<\/b><b><\/b><\/p>\n<ul>\n<li>Direct contact with dust or paint residues on the skin, although uptake from paint residues is less likely because most Cr(VI) compounds used in paint are poorly soluble in water. Cr(VI) compounds that form under thermal insulation, for example, are soluble in water, and skin absorption is a significant risk there.<\/li>\n<li>Clothing or gloves contaminated with chromium-6-containing dust.<\/li>\n<\/ul>\n<p>&nbsp;<\/li>\n<li>\n<p class=\"p1\"><strong>Ingestion<\/strong><\/p>\n<ul>\n<li>\n<p class=\"p1\">Not washing hands before eating, drinking or smoking<\/p>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Contamination of surfaces in break rooms or vehicles<\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/li>\n<\/ul>\n<p class=\"p3\">SEEF carries out both exposure measurements for Cr(VI) compounds in air and surface measurements, so that you get a realistic picture of the actual risks in practice. Surface measurements can be carried out using <a href=\"https:\/\/seefbv.com\/en\/product\/veegmonster-set-chroom-6\/\">wipe samples<\/a>, ipe samples, which we then analyse in our laboratory. If you want to carry out a chromium-6 clearance, for example, you can also measure a wipe sample directly on site with our <a href=\"https:\/\/seefbv.com\/en\/product\/tk01-chroom-6-test-kit\/\">SEEF TK01 Chroom-6 Testkit<\/a>. But also paint samples to determine the possible risks during demolition or processing.<\/p>\n<h2><b>6. How do you know chromium-6 is present?<\/b><\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Chromium-6 has:<\/p>\n<ul>\n<li>No typical odour<\/li>\n<li>No fixed colour that you can always recognise<\/li>\n<li>No simple visual indication\n<p class=\"font-claude-response-body break-words whitespace-normal\">You cannot therefore reliably see or smell chromium-6. <a href=\"https:\/\/www.rivm.nl\/chroom6\">Measurements are necessary.<\/a><\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">A good approach consists of several steps:<\/p>\n<ol start=\"1\">\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Document and historical research<\/strong><\/p>\n<ul>\n<li>Drawings, specifications, paint specifications<\/li>\n<li>Maintenance history of objects and installations<\/li>\n<\/ul>\n<p>&nbsp;<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Risk assessment based on application<\/strong><\/p>\n<ul>\n<li>\n<p class=\"p1\">Year of construction, type of application (paint, insulation etc.), sector (for example defence, rail, bridges, power plants). <a href=\"https:\/\/seefbv.com\/en\/contact\/\">Contact<\/a> SEEF to discuss this for your situation.<\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Indicative measurements<\/strong><\/p>\n<ul>\n<li>\n<p class=\"p1\">Quick on-site tests to get an initial picture are sometimes used, depending entirely on the application. In paint, you can only reliably detect Cr(VI) through laboratory analysis. It is therefore advisable to agree on a good sampling strategy in advance and to carry this out and document it carefully. For Cr(VI) compounds under thermal insulation, for example, it may be useful to first test with a quick test such as the <a href=\"https:\/\/seefbv.com\/en\/product\/st01-chroom-6-swab-test\/\">SEEF ST01<\/a>, but these are very <strong>unreliable<\/strong> for a negative test result. The same applies to other suppliers of such quick tests. A negative test result must therefore always be followed by a reliable laboratory analysis.<\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Laboratory analysis<\/strong><\/p>\n<ul>\n<li>\n<p class=\"p1\">Validated, quantitative analysis for reliable decision-making. But be aware here too, as laboratories use different methods. For example, there is <a href=\"https:\/\/www.nen.nl\/nen-5617-2022-nl-303197\">NEN5617:2022<\/a>,, developed specifically for measuring Cr(VI) compounds in dry paint samples. However, this is semi-quantitative, meaning that a reliable quantity of Cr(VI) cannot be determined. This is due to interfering metals such as zinc and aluminium, and a concession in the digestion process because of those interfering metals. Another widely used method is <a href=\"https:\/\/www.nen.nl\/nen-en-iso-15192-2021-en-285287\">NEN-EN-ISO 15192:2021<\/a>, which was developed for waste and soil and is therefore also unsuitable for measuring Cr(VI) compounds in dry paint. This method also has significant matrix interference from metals such as zinc and aluminium, which are common in the paint matrix.<\/p>\n<\/li>\n<li>SEEF has a patented technique for the digestion phase, which enables us to determine the concentration of Cr(VI) present in various matrices much more accurately.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p class=\"font-claude-response-body break-words whitespace-normal\">On the following pages we explain these topics further:<\/p>\n<ul>\n<li>\n<p class=\"p1\"><a href=\"https:\/\/seefbv.com\/en\/docs\/exposure-measurements-for-crvi-compounds\/\"><i>Exposure measurements for Cr(VI) compounds<\/i><span class=\"Apple-converted-space\">\u00a0\u00a0<\/span><\/a><\/p>\n<\/li>\n<li>\n<p class=\"p1\"><a href=\"https:\/\/seefbv.com\/en\/docs\/why-crvi-in-insulation-requires-a-different-analysis\/\"><i>Why Cr(VI) in Insulation Requires a Different Analysis<\/i><\/a><\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><b>7. Test and analysis methods for chromium-6<\/b><\/h2>\n<h3><b>7.1 Quick indicative tests on site<\/b><\/h3>\n<p class=\"p3\">For certain situations a quick initial indication is useful. For example with insulation around turbines and CHP engines. SEEF offers among others:<\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>ST01 chromium-6 swab test<\/strong> for insulation and (turbine) engines<\/p>\n<ul>\n<li>\n<p class=\"p1\">Intended as a quick first indication, but very unreliable for a negative test result.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Also not permitted by the Netherlands Labour Authority as a reliable method. Read at the bottom of this page: &#8220;To determine yourself using an approved method whether the surface contains chromium. There must be representative sampling, suitable preservation and conditioning, suitable analysis and quality assurance. There are some quick tests on the market (&#8216;cotton swab test&#8217;), these are insufficiently reliable to use as the only test.&#8221;<\/p>\n<\/li>\n<li>Buy this quick test <a href=\"https:\/\/seefbv.com\/en\/product\/st01-chroom-6-swab-test\/\">here<\/a>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Important to emphasize again:<\/p>\n<ul>\n<li>\n<p class=\"p1\">A <strong>positive result means<\/strong> that chromium-6 may be present<\/p>\n<\/li>\n<li>\n<p class=\"p1\">A n<strong>egative result<\/strong> certainly does <strong>not<\/strong> rule out the presence of chromium-6!<\/p>\n<\/li>\n<li>\n<p class=\"p1\">In case of doubt, <strong>additional analysis<\/strong> with the TK01 test kit or a laboratory analysis is always required.<\/p>\n<\/li>\n<\/ul>\n<p class=\"p3\">More explanation can be found on the knowledge base page <a href=\"https:\/\/seefbv.com\/en\/docs\/1-st01-chroom-6-swab-test\/\"><i>ST01 chroom-6 swab test<\/i>.<\/a><\/p>\n<p>&nbsp;<\/p>\n<h3><b>7.2 Reliable laboratory analysis<\/b><\/h3>\n<p class=\"p3\">For policy, contracts, legal discussions and health assessment, quantitative laboratory analysis is essential. Important official standards include:<\/p>\n<ul>\n<li>\n<p class=\"p1\"><b>NEN 5617:2022<br \/>\n<\/b><b><\/b>Semi-quantitative determination of chromium-6 in dry paint samples by alkaline digestion, clean-up and UV detection.<\/p>\n<\/li>\n<li>\n<p class=\"p1\"><b>ASTM D6966-18<br \/>\n<\/b>Standard for collecting dust via wipe sampling on surfaces, so that samples are suitable for analysis of metals and Cr(VI).<\/p>\n<\/li>\n<li><strong>SEEF DP01 &#8211; Cr(VI) determination in dry paint samples<br \/>\n<\/strong>Proprietary method based on NEN5617:2022, in which SEEF&#8217;s patented technique is used during the digestion phase to stabilise the Cr(VI) and prevent reduction by metals such as zinc or aluminium.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">SEEF aligns with these standards by:<\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li>Use of <strong>wipe sample<\/strong>s in accordance with ASTM D6966-18 with our <strong>WS01<\/strong> <strong>wipe sample set chromium-6.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"p1\">Application of a <strong>patented analysis techniqu<\/strong>e for Cr(VI), which greatly reduces interference from metals such as zinc and aluminium.<\/p>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Analyses within an <strong>ISO\/IEC 17025-compliant<\/strong> quality framework, so that results are reproducible and defensible.<\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><b>7.3 TK01 chromium-6 test kit: reliable detection on site<\/b><\/h3>\n<p class=\"p3\">The <strong>TK01 chromium-6 test kit<\/strong> has been developed to reliably detect chromium-6 on site in, among others, insulation, lubricants, anti-seize pastes and stainless steel components. The kit uses SEEF&#8217;s patented detection technique and can analyse up to six samples simultaneously.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Applications:<\/p>\n<ul>\n<li>\n<p class=\"p1\">Research around gas turbines, CHPs and other installations.<\/p>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Clearance measurements on site.<\/p>\n<\/li>\n<\/ul>\n<p class=\"p3\">Important: for quantitative substantiation (for example for an exposure or risk analysis) we always recommend supplementing with laboratory analysis.<\/p>\n<p>&nbsp;<\/p>\n<h2><b>8. How SEEF helps at project, management and organisational level<\/b><\/h2>\n<p class=\"p3\">Chromium-6 is not purely a technical issue. It affects policy, organisation, communication and day-to-day operations.<\/p>\n<h3><b>8.1 Projectlevel<\/b><\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">At project level SEEF assists with:<\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Preliminary research and risk assessment<\/strong><\/p>\n<ul>\n<li>\n<p class=\"p1\">Analysis of drawings, specifications, material and insulation specifications.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Inventory and sampling on site<\/p>\n<ul>\n<li>\n<p class=\"p1\">Wipe samples in accordance with ASTM D6966-18.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Material samples of paint, insulation and dust.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Air measurements in the breathing zone of employees or stationary measurements to establish the background concentration.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Interpretation of measurement results<\/strong><\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Linking to limit values and health-based advisory values.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Practical advice for the work<\/strong><\/p>\n<ul>\n<li>Choice of working methods and extraction.<\/li>\n<li>Personal protective equipment (PPE).<\/li>\n<li>Clearance criteria after remediation or maintenance<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p class=\"p3\">More on this can be found in <a href=\"https:\/\/seefbv.com\/en\/docs\/exposure-measurements-for-crvi-compounds\/\"><i>Exposure measurements for Cr(VI) compounds<\/i><\/a> and <i><a href=\"https:\/\/seefbv.com\/en\/docs\/why-crvi-in-insulation-requires-a-different-analysis\/\">Why Cr(VI) in Insulation Requires a Different Analysis<\/a><\/i><\/p>\n<p>&nbsp;<\/p>\n<h3><b>8.2 M<\/b><strong>anagement and organisational level<\/strong><\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">At organisational level SEEF supports among others with:<\/p>\n<ul>\n<li>\n<p class=\"p1\">Drawing up or tightening <strong>hazardous substances<\/strong> policy with specific attention to chromium-6<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Integrating chromium-6 into the<strong> risk assessment<\/strong>, including a multi-year control plan<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Setting up <strong>exposure registration<\/strong> and retention periods in accordance with legislation<\/p>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Embedding in <strong>contracts and tenders<\/strong><\/p>\n<ul>\n<li>Requirements for inventory and research<\/li>\n<li>Requirements for contractors and executing parties<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"p1\"><strong>Training and awareness<\/strong> for management, HSE, project managers and operators<\/p>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Management reports<\/strong> suitable for board, works council and supervisory authorities<\/p>\n<\/li>\n<\/ul>\n<p class=\"p3\">An overview of our services can be found in <a href=\"https:\/\/seefbv.com\/en\/docs\/seef-products-and-services\/\"><i>SEEF products and services<\/i><\/a>\u00a0and <i><a href=\"https:\/\/seefbv.com\/en\/docs\/about-seef-who-we-are-and-what-we-do\/\">about SEEF<\/a>: who we are and what we do.<\/i><\/p>\n<p>&nbsp;<\/p>\n<h2><b>9. What to do if you suspect chromium-6<\/b><\/h2>\n<p class=\"p3\">If you notice that chromium-6 may be present in a project or installation while you have already started work, here is a practical step-by-step plan:<\/p>\n<ol start=\"1\">\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>STOP and assess the situation<\/strong><\/p>\n<ul>\n<li>Avoid unnecessary dust generation<\/li>\n<li>Put temporary measures in place such as using suitable PPE and cordon off the work area<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Gather <strong>information<\/strong><\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Year of construction, maintenance history, coatings used, insulation data etc.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Call in a specialist<\/strong><\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Have a risk assessment drawn up and, if necessary, a targeted sampling plan<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Have measurements carried out<\/strong><\/p>\n<ul>\n<li>Quick indication with ST01 and\/or TK01 where appropriate<\/li>\n<li>Laboratory analyses for definitive substantiation; SEEF can also carry this out quickly with a maximum turnaround time of 5 working days in our own laboratory.<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Translate the results into policy and work plan<\/strong><\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Working methods, technical measures, organisational measures, PPE, shielding, cleaning and monitoring.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Record measures and results<\/strong><\/p>\n<ul>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\">In the risk assessment, work plans, completion file and exposure register. Ensure this is also embedded at organisational level and that the risk assessment is updated accordingly.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>SEEF can support you throughout this entire chain, from the first question to a workable solution and embedding of results into policy.<\/p>\n<p>&nbsp;<\/p>\n<h2><b>10. Frequently asked questions about chromium-6<\/b><\/h2>\n<h3><b>1. <\/b><strong>Is chromium-6 always dangerous at any level of exposure?<\/strong><\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">The risk depends on the amount and duration of exposure and the way in which you absorb chromium-6. Brief, low exposure will carry a smaller risk than prolonged exposure in a workplace without protective measures. Because chromium-6 is carcinogenic, the principle applies in work situations that exposure must be<strong> reduced as far as reasonably practicable<\/strong>, and a strict limit value of 1 \u00b5g\/m\u00b3 as an 8-hour TWA applies.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">A vivid metaphor given by Jody Schinkel (TNO) during the CIKC event on chromium-6 under thermal insulation is that of a large tub of balls. Imagine a tub with <strong>1 million yellow balls and 1 black ball<\/strong>. With every exposure you have to reach in once. The more often you are exposed, the more often you have to reach into the tub and the greater the chance of picking up that black ball. In this image the black ball represents developing cancer.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Some people will never pick the black ball, even if they have to reach in very often. Others have less exposure but are unlucky anyway. The message is: you can never fully control the risk, but you can make it as small as possible by reducing exposure as far as possible.<\/p>\n<h3><b>2. Does &#8220;safe&#8221; chromium exist?<\/b><\/h3>\n<p class=\"p3\">Chromium-3 (Cr(III)) is the more stable form of chromium and much less harmful to health than chromium-6. In the body, chromium-6 compounds are ultimately converted to chromium-3, but if that happens inside the cell it can actually cause DNA damage.<\/p>\n<h3><b>3. <\/b><strong>Can you identify chromium-6 from the colour of paint or insulation?<\/strong><\/h3>\n<p class=\"p3\">No. Chromium-6 compounds exist in various colours and some applications are not even clearly recognisable from the outside. Looking at colour or gloss alone is therefore not reliable. You always need a reliable measurement and analysis.<\/p>\n<h3><b>4. When do you choose a quick test and when a laboratory analysis?<\/b><\/h3>\n<p class=\"p3\">Quick tests (such as the ST01 swab test) are suitable as an initial indication or screening but are insufficiently reliable. For policy decisions, legal discussions, clearance of objects or substantiation for supervisory authorities, you need a validated laboratory analysis that aligns with official standards such as NEN 5617 and ASTM D6966-18.<\/p>\n<h3><b>5. an SEEF help to structurally embed chromium-6 in our safety policy?<\/b><\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Yes. SEEF supports organisations with:<\/p>\n<ul>\n<li class=\"font-claude-response-body break-words whitespace-normal\">Drawing up hazardous substances policy with attention to chromium-6<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\">Embedding in risk assessments, multi-year plans and tenders<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\">Measuring, interpreting and reporting exposure<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\">Training and awareness within the organisation<\/li>\n<\/ul>\n<p class=\"p3\"><b>6. Can chromium-6 disappear on its own or become less harmful?<\/b><\/p>\n<p class=\"p3\">No. Chromium-6 does not disappear from material or dust on its own. Under certain conditions it can be chemically converted to chromium-3 (Cr(III)), a less harmful form. This happens for example on contact with certain reducing agents or under strongly moist conditions. But this process cannot be controlled, proceeds slowly and can reverse: chromium-3 can under the right conditions oxidise back to chromium-6. You can therefore never assume that chromium-6 has spontaneously disappeared. Reliable analysis is always necessary, combined with the knowledge required to choose an appropriate strategy.<\/p>\n<h3><b>7. When is it useful to carry out air measurements rather than material research alone?<\/b><\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Air measurements are particularly valuable when:<\/p>\n<ul>\n<li>\n<p class=\"p1\">Work is taking place that generates <strong>dust, fumes or mist<\/strong>.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">There is doubt whether employees are <strong>inhaling<\/strong> chromium-6 despite control measures.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">You need to demonstrate compliance with the<strong> statutory limit value<\/strong> of 1 \u00b5g\/m\u00b3.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">You want to carry out a <strong>baseline measurement, progress measurement or clearance measurement.<\/strong><\/p>\n<\/li>\n<li>\n<p class=\"p1\">You want to substantiate <strong>actual exposure<\/strong> in a risk assessment.<\/p>\n<\/li>\n<\/ul>\n<p class=\"p3\">Material research tells you whether chromium-6 is present, but only air measurements show whether employees are actually inhaling it. SEEF supports both types of measurement, including interpretation and advice on control.<\/p>\n<h3><b>8. Why can one paint or insulation contain chromium-6 while another cannot?<\/b><\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">Whether chromium-6 is present depends on:<\/p>\n<ul>\n<li>\n<p class=\"p1\"><b><\/b><strong>Year of construction or production date<\/strong>: older coatings and primers contain it more often.<\/p>\n<\/li>\n<li>\n<p class=\"p1\"><strong>Application<\/strong>: corrosion resistance, heat resistance, chemical resistance or as a pigment in paint.<\/p>\n<\/li>\n<li>\n<p class=\"p1\"><strong>Temperature load<\/strong>: at high temperatures, chromium in steel can react with calcium in insulation, causing chromium-6 to form.<\/p>\n<\/li>\n<li>\n<p class=\"p1\"><strong>Supplier or batch differences.<\/strong><\/p>\n<\/li>\n<\/ul>\n<p class=\"p3\">Even within the same installation, sections of material with and without chromium-6 can occur. That is why SEEF works with a<strong> targeted sampling plan<\/strong>, based on document research, risk analysis and targeted tests.<\/p>\n<h3><b>9. How do I know if my organisation is doing enough to protect workers?<\/b><\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">A good indicator is whether you meet the following elements:<\/p>\n<ul>\n<li>\n<p class=\"p1\"><strong>The risk assessment<\/strong> explicitly includes chromium-6 as a hazardous substance.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">An <strong>exposure assessment<\/strong> has been carried out based on measurements and validated against NEN689.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Policy follows the <strong>occupational hygiene strategy<\/strong> (source control, extraction, PPE etc.).<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Employees have received <strong>training<\/strong> on risks and safe working and repeat this annually.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">An <strong>exposure register<\/strong> is maintained for at least 40 years.<\/p>\n<\/li>\n<li>\n<p class=\"p1\">Contracts with contractors include agreements on research, measurements and measures.<\/p>\n<p>&nbsp;<\/li>\n<li>Results are evaluated annually and tightened where necessary.<\/li>\n<\/ul>\n<p class=\"font-claude-response-body break-words whitespace-normal\">SEEF can provide support to embed all components, both technically and organisationally.<\/p>\n<h3><b>10. What is the difference between an indicative test (ST01) and a reliable test (TK01)?<\/b><\/h3>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li>\n<p class=\"p1\"><b>ST01 swab test<\/b><b><\/b><\/p>\n<ul>\n<li>Quick indication for positive results.<\/li>\n<li>Susceptible to false negative results.<\/li>\n<li>Not suitable as legal or policy evidence.Not suitable for paint.<\/li>\n<\/ul>\n<p>&nbsp;<\/li>\n<li>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>TK01 test kit (SEEF&#8217;s patented method)<\/strong><\/p>\n<ul>\n<li>Reliable detection, based on the same chemical principles as laboratory analysis.<\/li>\n<li>Greatly reduced chance of interference from metals such as zinc and aluminium.<\/li>\n<li>Suitable for insulation, lubricants, anti-seize pastes.<\/li>\n<li>Can be used to measure paint, but laboratory analysis is strongly preferred.<\/li>\n<li>Can be used as substantiation in reports, work plans and clearances.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>{<br \/>\n  &#8220;@context&#8221;: &#8220;https:\/\/schema.org&#8221;,<br \/>\n  &#8220;@type&#8221;: &#8220;FAQPage&#8221;,<br \/>\n  &#8220;url&#8221;: &#8220;https:\/\/seefbv.com\/en\/docs\/wat-is-chroom-6\/&#8221;,<br \/>\n  &#8220;mainEntity&#8221;: [<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Is chroom-6 altijd gevaarlijk bij elke blootstelling?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Het risico hangt af van de hoeveelheid en duur van de blootstelling en de manier waarop je chroom-6 binnenkrijgt. Kortdurende, lage blootstelling zal een kleiner risico geven dan langdurige blootstelling op een werkplek zonder beschermingsmaatregelen. Omdat chroom-6 kankerverwekkend is, geldt in arbeidssituaties het principe dat blootstelling zoveel als redelijkerwijs mogelijk moet worden beperkt en is er een strenge grenswaarde van 1 \u00b5g\/m\u00b3 als 8-uurs TGG.\\n\\nEen beeldende metafoor die Jody Schinkel (TNO) gaf tijdens het CIKC-event over chroom-6 onder thermische isolatie is die van een grote bak met ballen. Stel je een bak voor met 1 miljoen gele ballen en 1 zwarte bal. Bij elke blootstelling moet je \u00e9\u00e9n keer grabbelen in die bak. Hoe vaker je wordt blootgesteld, hoe vaker je moet grijpen in de bak en hoe groter de kans wordt dat je een keer die zwarte bal pakt \u2013 in dit beeld staat die zwarte bal voor het ontwikkelen van kanker.\\n\\nSommige mensen zullen, ondanks dat ze heel vaak in de bak moeten grijpen, die zwarte bal nooit pakken. Anderen hebben minder vaak blootstelling, maar hebben toch pech. De boodschap is: je hebt het risico nooit volledig in de hand, maar je kunt het w\u00e9l zo klein mogelijk maken door blootstelling zo ver mogelijk terug te dringen.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Bestaat er ook \u201cveilig\u201d chroom?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Chroom-3 (Cr(III)) is de meer stabiele vorm van chroom en veel minder schadelijk voor de gezondheid dan chroom-6. In het lichaam worden chroom-6-verbindingen uiteindelijk omgezet naar chroom-3, maar als dat \u00edn de cel gebeurt kan er juist schade ontstaan aan dna.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Kun je chroom-6 zien aan de kleur van verf of isolatie?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Nee. Er bestaan chroom-6-verbindingen met verschillende kleuren en sommige toepassingen zijn zelfs niet duidelijk aan de buitenkant te herkennen. Alleen kijken naar kleur of glans is daarom niet betrouwbaar. Je hebt altijd een betrouwbare meting en analyse nodig.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Wanneer kies je voor een snelle test en wanneer voor laboratoriumanalyse?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Snelle testen (zoals de ST01 swab test) zijn geschikt als eerste indicatie of screening maar zijn onvoldoende betrouwbaar. Voor beleidsbeslissingen, juridische discussies, vrijgave van objecten of onderbouwing richting toezichthouders heb je een gevalideerde laboratoriumanalyse nodig die aansluit op offici\u00eble normen zoals NEN 5617 en ASTM D6966-18.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Kan SEEF helpen om chroom-6 structureel in ons veiligheidsbeleid op te nemen?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Ja. SEEF ondersteunt organisaties bij:\\n\\n- Opstellen van beleid gevaarlijke stoffen met aandacht voor chroom-6.\\n- Inbedding in RI&amp;E, meerjarenplannen en aanbestedingen.\\n- Meten, interpreteren en rapporteren van blootstelling.\\n- Training en bewustwording binnen de organisatie.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Kan chroom-6 vanzelf verdwijnen of minder schadelijk worden?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Nee. Chroom-6 verdwijnt niet vanzelf uit materiaal of stof. Het kan onder bepaalde omstandigheden w\u00e9l chemisch worden omgezet naar chroom-3 (Cr(III)), een minder schadelijke vorm. Dat gebeurt bijvoorbeeld bij contact met bepaalde reductiemiddelen of onder sterk vochtige omstandigheden. Maar dat proces is niet te controleren, verloopt traag en kan zich omkeren: chroom-3 kan onder de juiste omstandigheden opnieuw oxideren naar chroom-6. Je mag er daarom nooit van uitgaan dat chroom-6 spontaan weg is. Betrouwbare analyse blijft altijd nodig samen met kennis van de materie om een geschikte strategie te kiezen.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Wanneer is het zinvol om luchtmetingen te doen in plaats van alleen materiaalonderzoek?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Luchtmetingen zijn vooral waardevol wanneer:\\n\\n- Er werkzaamheden plaatsvinden waarbij stof, rook of nevel ontstaat.\\n- Er twijfel is of medewerkers chroom-6 inademen, ondanks beheersmaatregelen.\\n- Je moet aantonen dat je voldoet aan de wettelijke grenswaarde van 1 \u00b5g\/m\u00b3.\\n- Je een nulmeting, voortgangsmeting of vrijgavemeting wilt uitvoeren.\\n- Je in een RI&amp;E de werkelijke blootstelling wilt onderbouwen.\\n\\nMateriaalonderzoek vertelt of chroom-6 aanwezig is, maar alleen luchtmetingen laten zien of medewerkers het ook inademen. SEEF ondersteunt bij beide meetvormen, inclusief interpretatie en advies over beheersing.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Waarom kan de ene verf of isolatie w\u00e9l en de andere g\u00e9\u00e9n chroom-6 bevatten?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Of chroom-6 aanwezig is, hangt af van:\\n\\n- Bouwjaar of productiedatum: oude coatings en primers bevatten het vaker.\\n- Toepassing: corrosiewering, hittebestendigheid, chemische bestendigheid of als pigment in verf.\\n- Temperatuurbelasting: bij hoge temperaturen kan chroom in staal reageren met calcium in isolatie, waardoor chroom-6 kan ontstaan.\\n- Leverancier of batchverschillen.\\n\\nZelfs binnen dezelfde installatie kunnen stukken materiaal met en zonder chroom-6 voorkomen. Daarom werkt SEEF met een gericht bemonsteringsplan, gebaseerd op documentonderzoek, risicoanalyse en gerichte tests.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Hoe weet ik of mijn organisatie genoeg doet om werknemers te beschermen?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;Een goede graadmeter is of je voldoet aan de volgende elementen:\\n\\n- RI&amp;E bevat chroom-6 expliciet als gevaarlijke stof.\\n- Er is een blootstellingsbeoordeling uitgevoerd op basis van metingen en deze is getoetst aan de NEN689.\\n- Beleid volgt de arbeidshygi\u00ebnische strategie (bronaanpak, afzuiging, PBM, etc.).\\n- Medewerkers hebben training gevolgd over risico\u2019s en veilig werken en herhalen dit jaarlijks.\\n- Er is een blootstellingsregister dat ten minste 40 jaar wordt bewaard.\\n- Contracten met aannemers bevatten afspraken over onderzoek, metingen en maatregelen.\\n- Resultaten worden jaarlijks ge\u00ebvalueerd en waar nodig aangescherpt.\\n\\nSEEF kan ondersteuning bieden om alle onderdelen te borgen, zowel technisch als organisatorisch.&#8221;<br \/>\n      }<br \/>\n    },<br \/>\n    {<br \/>\n      &#8220;@type&#8221;: &#8220;Question&#8221;,<br \/>\n      &#8220;name&#8221;: &#8220;Wat is het verschil tussen een indicatieve test (ST01) en een betrouwbare test (TK01)?&#8221;,<br \/>\n      &#8220;acceptedAnswer&#8221;: {<br \/>\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,<br \/>\n        &#8220;text&#8221;: &#8220;ST01 swab test:\\n\\n- Snelle indicatie voor positieve resultaten.\\n- Gevoelig voor valse negatieve resultaten.\\n- Niet geschikt als juridisch of beleidsmatig bewijs.\\n- Ongeschikt voor verf.\\n\\nTK01 testkit (SEEF\u2019s gepatenteerde methode):\\n\\n- Betrouwbare detectie, gebaseerd op dezelfde chemische principes als laboratoriumanalyse.\\n- Sterk verminderde kans op interferentie door metalen zoals zink en aluminium.\\n- Geschikt voor isolatie, smeermiddelen, anti-seize pastes.\\n- Kan worden gebruikt om verf te meten, maar een laboratoriumanalyse geniet sterk de voorkeur.\\n- Bruikbaar als onderbouwing in rapportages, werkplannen en vrijgaves.&#8221;<br \/>\n      }<br \/>\n    }<br \/>\n  ]<br \/>\n}<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[59],"glossaries":[],"doc_tag":[],"class_list":["post-5315","docs","type-docs","status-publish","hentry","doc_category-everything-about-crvi-compounds"],"year_month":"2026-08","word_count":3255,"total_views":"1331","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"Ferdy de Smet","author_nicename":"ferdy","author_url":"https:\/\/seefbv.com\/en\/author\/ferdy\/"},"doc_category_info":[{"term_name":"Everything about Cr(VI) compounds","term_url":"https:\/\/seefbv.com\/en\/docs-category\/everything-about-crvi-compounds\/"}],"doc_tag_info":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What is chromium-6? 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