Publication of GB mandatory classification and labelling (GB MCL) Agency Opinions


A GB MCL Agency Opinion formally proposes the GB mandatory classification and labelling for chemicals substances, based on the scientific and technical assessment of the scientific data in line with the GB 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.

The first batch of 23 GB MCL Agency Opinions are now available for download in the GB MCL publication table (.xlsx).

These GB MCL Agency Opinions relate to substances for which HSE (as the GB CLP Agency) published Agency Technical Reports under Article 37 of the GB CLP Regulation in June 2021.

At the time of publication, the classification and labelling proposed in these Agency Opinions has 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 late May 2022. CLP e-Bulletin alerts will be issued when Agency Opinions are published on the HSE website.

If you have any questions or feedback on the GB MCL Agency Opinions, please contact us at:

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HSE, 20-05-2022