SVHC Candidate List Checker

This SVHC checker screens CAS numbers, EC numbers, and substance names from your product data against the REACH Candidate List of Substances of Very High Concern, so you can flag affected SKUs before they reach a customer compliance request. Paste a column from a spreadsheet or a single substance and get an instant, plain-language match.

SVHC Candidate List Checker

Runs in your browser · no upload

Paste CAS numbers, EC numbers or substance names — one per line, or a CSV/BOM with a header row

Add a concentration (e.g. 0.3% or 1500 ppm) to see whether the 0.1% w/w article threshold is crossed.

Screen list Upload CSV / TXT Try an example Clear

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Screens against the ECHA Candidate List only (REACH Annex XIV authorisation and Annex XVII restrictions are separate lists). A match is a flag for review, not a compliance determination. See how Claro keeps SVHC status current across a whole catalog →

What it checks

The checker takes each substance you enter and compares it against the published REACH Candidate List entries. For every row it returns:

• Candidate List match — whether the CAS number, EC number, or name corresponds to a listed SVHC, with the matched entry shown back to you.
• Identifier normalization — strips stray spaces, hyphens, and prefixes so CAS 117-81-7, 117817, and 117-81-7 all resolve to the same substance before matching.
• Match basis — whether the hit came from the CAS number, EC number, or substance name, so you know how confident to be in an exact-name match versus a synonym.
• Reason for inclusion — the hazard category recorded for that entry (for example carcinogenic, toxic for reproduction, or PBT), in plain language.
• No-match flagging — rows that did not match, separated from blanks and malformed identifiers so you can chase missing data rather than assume “clean.”
• Bulk pass/fail summary — a count of listed, not-listed, and unverifiable rows across the whole paste, ready to drop back into your sheet.

How the SVHC checker works

The REACH Candidate List is maintained by the European Chemicals Agency (ECHA) and updated twice a year, typically in January and June. Each entry carries a substance name, an EC number, a CAS number where one exists, and the reason it was added. Suppliers of articles must communicate the presence of a listed substance above the 0.1% weight-by-weight threshold down the supply chain, which is why distributors in MRO, furniture, CPG packaging, and industrial supply increasingly receive SVHC questionnaires from buyers.

The tool matches identifiers first: CAS and EC numbers are check-digit validated and looked up exactly, including the substances ECHA lists under group entries. Only when no identifier matches does it fall back to a normalized name comparison. Because substances often appear under several synonyms, a name-only hit is reported as lower confidence and worth a manual look.

The bundled list is the ECHA Candidate List as downloaded on September 29, 2026: 253 entries, the most recent added on February 4, 2026. Check ECHA’s Candidate List table for entries added after that date.

What a match means: the 0.1% threshold, Article 33 and SCIP

The duties attach to a listed substance in an article above 0.1% weight by weight, measured against each article — for a complex product, each component article. Add a concentration to a row (for example 0.3% or 1500 ppm) and the checker tells you whether that line crosses 0.1%.

• REACH Article 33 — a supplier of such an article must give recipients enough information to use it safely, at least the substance name, and must answer a consumer’s request within 45 days.
• SCIP notification — under the Waste Framework Directive, the same articles must be notified to ECHA’s SCIP database before they are placed on the EU market.
• REACH Article 7(2) — producers and importers must also notify ECHA when the substance is present above 0.1% w/w and above one tonne per year in their articles, unless an exemption applies.

For a one-off questionnaire this is enough. The harder problem is keeping thousands of SKUs continuously screened as the list changes and as suppliers ship new material data sheets. That is a product enrichment job: pulling CAS numbers out of SDS and spec documents, attaching provenance to each, and re-screening the catalog every time ECHA publishes an update — which is exactly what Claro’s canonical product-data layer is built to do.

Related resources

FAQ

What is an SVHC and the REACH Candidate List? +

A Substance of Very High Concern (SVHC) is a chemical that ECHA has identified as carcinogenic, mutagenic, toxic for reproduction, persistent and bioaccumulative, or of equivalent concern. Once formally identified, a substance is added to the Candidate List for authorisation under the EU REACH regulation. The list is the reference set this checker screens against.

How often is the SVHC Candidate List updated? +

ECHA typically updates the Candidate List twice a year, around January and June, adding newly identified substances. Because of this cadence, a catalog that was clean six months ago can contain newly listed substances. Re-screening after each update is the standard practice — verify against the current ECHA publication for the live entry count.

Does an SVHC match mean my product is non-compliant? +

No. A match means a substance in your data appears on the Candidate List. Obligations such as supply-chain communication generally apply when a listed substance is present in an article above 0.1% weight by weight, and notification duties depend on tonnage. The checker surfaces candidates for review; your compliance team confirms the actual duty.

Can I check a whole spreadsheet of CAS numbers at once? +

Yes. Paste an entire column of CAS numbers, EC numbers, or substance names and the tool screens every row, returning a per-row result plus a summary of listed, not-listed, and unverifiable entries. There is no row limit because all processing happens in your browser.

Is my product data uploaded anywhere? +

No. The SVHC checker runs entirely client-side. Your pasted or uploaded data never leaves your browser — nothing is transmitted, stored, or logged — so you can screen confidential bills of materials and supplier files safely.