New 2-day Chesar training session at ECHA premises in April 2019


ECHA will organise another two-day training course on the Chesar tool, on 16-17 April 2019 at the ECHA premises in Helsinki. Please register by 25 March 2019 if you would like to participate.

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Chesar 3.4 available for download


An update of ECHA's chemical safety assessment and reporting tool, Chesar, has been published.

Chesar website switches to ECHA user accounts


The same log in credentials can be used to log in to all sites and tools provided by ECHA.

What is Chesar?

CHEmical Safety Assessment and Reporting tool

Chesar is an application developed by the European Chemicals Agency (ECHA) to help companies to carry out their chemical safety assessments (CSAs) and to prepare their chemical safety reports (CSRs) and exposure scenarios (ESs) for communication in the supply chain.

Chesar enables registrants to carry out their safety assessments in a structured, harmonised, transparent and efficient way. This includes the importing of substance-related data directly from IUCLID, describing the uses of the substance, carrying out exposure assessment including identifying conditions of safe use, related exposure estimates and demonstrating control of risks. Based on this, Chesar automatically generates the CSR and exposure scenarios for communication as a text document, and export information on use and exposure to IUCLID. Chesar also facilitates the re-use (or update) of assessment elements generated in a single Chesar instance or imported from external sources.