What ECHA publishes from REACH Registrations

Why ECHA publishes registration information

The European Chemicals Agency (ECHA) disseminates information from REACH registration dossiers so regulators, companies, workers, and the public can understand chemical hazards and uses. Public information can include substance identity, classification and labelling, study summaries, physicochemical data, environmental fate, toxicology, and guidance on safe use.

In 2016, ECHA announced plans to publish more information from registrations. The change reflected REACH’s “no data, no market” principle and growing expectations for transparency. Since then, dissemination systems and dossier formats have continued to evolve, so the scope and presentation of public data should be checked against current ECHA guidance.

What remains confidential?

Not every submitted field is automatically public. Registrants may request confidentiality for eligible information, but claims must have a legal basis and adequate justification. Some information cannot be kept confidential under REACH. A weak or outdated claim may be rejected, while excessive redaction can make a dossier inconsistent or difficult to evaluate.

Current dissemination and confidentiality

ECHA’s current dissemination and confidentiality manual reflects modern IUCLID and REACH-IT workflows. Before submitting or updating a dossier, companies should use IUCLID’s dissemination preview, review legal-entity and substance identity information, remove unnecessary confidential material from free-text fields and attachments, and ensure that public summaries agree with the technical dossier. Dossier maintenance matters because new data, uses, tonnage bands, classifications, or company details can trigger an update.

How Nexreg can help

Nexreg can support REACH data review, SDS alignment, and supply-chain compliance while helping teams identify information that requires specialist confidentiality analysis. Contact Nexreg before a dossier update or EU market entry.