IUCLID (International Uniform ChemicaL Information Database)

IUCLID is the software application developed by ECHA and OECD for recording, storing, maintaining, and exchanging data on intrinsic and hazard properties of chemical substances. REACH registrants use IUCLID to prepare and submit registration dossiers to ECHA via REACH-IT. IUCLID dossiers contain physico-chemical data, toxicological and ecotoxicological data, classification and labelling, and Chemical Safety Reports. ECHA regularly updates IUCLID to align with regulatory and format changes.

ECHA IUCLID documentation; REACH Regulation (EC) No 1907/2006, Article 10 and Annexes VI–X.

REACH registrants must use IUCLID to prepare and submit compliant registration dossiers. ECHA provides IUCLID as a free tool. The dossier format is validated before submission to REACH-IT; submission failures typically require IUCLID dossier correction. IUCLID also supports the preparation of PPORD and C&L notification submissions. Registrants should use the current IUCLID version to ensure dossier format compatibility.