Publication of GB mandatory classification and labelling (GB MCL) Agency Opinions
The next batch of GB MCL Agency Opinions are now available for download.
A GB MCL Agency Opinion formally proposes the GB MCL for chemical substances, based on the scientific and technical assessment of the scientific data in line with the GB Chemical classification, labelling and packaging (CLP) Regulation, together with an assessment of the policy and socio-economic impacts on the UK.
It sets out whether there is adequate scientific evidence to support a new or revised GB MCL of a substance and what the potential impact of the proposed GB MCL may be.
Download the next batch of Agency Opinions from the GB MCL publication table.
These GB MCL Agency Opinions relate to substances for which HSE (as the GB CLP Agency) published an Agency Technical Report under Article 37 of the GB CLP Regulation in 2025.
At the time of publication, the classification and labelling proposed in these Agency Opinions have not been agreed and/or adopted in Great Britain.
For information on the next steps in the process, please see our webpage on the GB MCL system.
We expect to publish our next batch of Agency Opinions in September 2026. CLP ebulletin alerts will be issued when Agency Opinions are published on the HSE website.
If your business is affected by the GB CLP Regulation, please also consider if you are likely to be affected by the classification and labelling proposals.
