EU Substances of Very High Concern (SVHCs)

The EU's watch list for the worst chemicalsExplain▾

Within REACH, the EU singles out its most concerning chemicals with a specific label: Substances of Very High Concern (SVHCs). For carcinogens, this is one of the most important mechanisms in the entire EU system — the path by which a cancer-causing chemical can be pushed off the market.

What qualifies as an SVHCExplain▾

A substance can be identified as an SVHC if it has serious, often irreversible effects on human health or the environment. The main categories include:

• CMRs — Carcinogens, Mutagens, and Reproductive toxicants (Category 1A/1B under CLP). Carcinogens are a core group here.
• PBT/vPvB substances — persistent, bioaccumulative, and toxic substances.
• Substances of equivalent concern, such as endocrine disruptors.

Because carcinogens fall squarely into the CMR category, a chemical classified as a carcinogen is a natural candidate for SVHC identification.

The candidate listExplain▾

Once identified, an SVHC is placed on the candidate list — a public register maintained by ECHA. Being on the candidate list is the first formal step toward tighter control, and it immediately creates legal duties for companies:

• Suppliers must provide safe-use information and safety data sheets to customers.
• For articles (products) containing an SVHC above 0.1% by weight, companies must notify ECHA and inform customers — and answer consumer questions within 45 days.

This transparency means that even before any ban, information about SVHCs flows through supply chains and to the public.

From candidate list to phase-outExplain▾

The candidate list is a waypoint, not the destination. From there, an SVHC can be moved to:

• The Authorisation List (Annex XIV). Substances on it cannot be used after a set "sunset date" unless a company obtains specific authorisation — which 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 overall design nudges industry to progressively replace SVHCs — including carcinogens — with safer alternatives. That gradual substitution is the strategic heart of the EU's chemical policy.

Why it mattersExplain▾

The SVHC process is how the EU turns a hazard classification into real-world removal. A chemical identified as a carcinogen doesn't just get a warning label — it can be placed on a public watch list, saddled with disclosure duties, and steered toward authorisation or restriction until it's phased out. It's the clearest expression of the EU's precautionary, hazard-led philosophy in action.

The bottom lineExplain▾

Substances of Very High Concern are the EU's designation for its most worrying chemicals, and carcinogens are a central category. Through the candidate list, disclosure duties, and the routes to authorisation and restriction, SVHC status is the mechanism that can move a carcinogen from labeled to phased out.