The short answer
Under REACH, the most worrying chemicals — including carcinogens — can be named Substances of Very High Concern. They go on a public 'candidate list,' triggering disclosure duties, and can be moved toward authorisation or restriction, pushing them off the market.
SVHCs are the most concerning chemicals under REACH.
Carcinogens, mutagens, and reproductive toxicants (CMRs) can qualify.
SVHCs go on a public 'candidate list.'
Listing triggers duties to inform customers and, for articles, ECHA.
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The full explanation.
The EU's watch list for the worst chemicals
Inside REACH, the EU marks out its most worrying chemicals with one label: Substances of Very High Concern (SVHCs). For carcinogens this is one of the most important tools in the whole EU system. It is the path by which a cancer-causing chemical can be pushed off the market.
What qualifies as an SVHC
A substance can be named an SVHC if it has serious, often permanent effects on human health or the environment. The main categories are:
- CMRs — Carcinogens, Mutagens, and Reproductive toxicants in Category 1A or 1B under CLP. Carcinogens are a core group here.
- PBT/vPvB substances, which last a long time, build up in living things, and are toxic.
- Substances of equivalent concern, such as endocrine disruptors.
Carcinogens sit squarely in the CMR category. So a chemical classed as a carcinogen is a natural candidate for SVHC status.
The candidate list
Once named, an SVHC goes on the candidate list. That is a public register kept by ECHA. Being on it is the first formal step toward tighter control. It also creates legal duties for companies right away:
- Suppliers must give customers safe-use information and safety data sheets.
- For articles (products) that hold an SVHC above 0.1% by weight, companies must notify ECHA and inform customers. They must also answer consumer questions within 45 days.
Because of this openness, news about SVHCs moves through supply chains and out to the public long before any ban.
From candidate list to phase-out
The candidate list is a waypoint, not the destination. From there, an SVHC can move to either of two places:
- The Authorisation List (Annex XIV). A substance on it cannot be used after a set "sunset date" unless a company wins specific authorisation. That is granted only under strict conditions, and with pressure to switch to alternatives.
- A restriction (Annex XVII). This can limit or ban specific uses across the EU.
The whole design nudges industry to replace SVHCs, carcinogens included, with safer alternatives. That slow swap is the strategic heart of EU chemical policy.
Why it matters
The SVHC process is how the EU turns a hazard classification into real-world removal. A chemical named as a carcinogen does not just get a warning label. It can be put on a public watch list, given disclosure duties, and steered toward authorisation or restriction until it is phased out. It is the clearest case of the EU's precautionary, hazard-led approach at work.
The bottom line
Substances of Very High Concern are the EU's label for its most worrying chemicals, and carcinogens are a central category. The candidate list, the disclosure duties, and the routes to authorisation and restriction all pull the same way. Together they can move a carcinogen from labeled to phased out.
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Common questions
What is a Substance of Very High Concern?
Under REACH, an SVHC is a chemical with serious, often irreversible effects on health or the environment. Carcinogens, mutagens, and reproductive toxicants (together called CMRs) are a major category of SVHCs.
What is the candidate list?
A public list of substances identified as SVHCs. Being placed on it is the first formal step toward possible authorisation or restriction, and it triggers legal duties for companies.
What duties does listing create?
Suppliers must provide safe-use information and safety data sheets, respond to consumer questions, and — for products (articles) containing an SVHC above 0.1% by weight — notify ECHA and inform customers.
Does SVHC status ban a chemical?
Not immediately. It's a step that can lead to authorisation (special permission needed to use) or restriction (limits or bans). The goal is to progressively replace SVHCs with safer alternatives.
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Sources last checked: 2026-08-11 what this meansLast updated: 2026-08-11Next planned review: 2028-07-05
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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