SG 151/25
The United Kingdom’s Health and Safety Executive (HSE) has updated the Great Britain mandatory classification and labeling list (GB MCL List) for substances and mixtures. This latest edition entered into force on September 23, 2025.
In September 2025, the HSE published documents supporting ministerial decisions on new or revised GB MCL entries, along with the seventh edition of the GB MCL List for substances and mixtures. This latest edition introduces new or revised legally binding mandatory classification and labeling for 32 substances, including, but not limited to:
The final compliance date for the new or revised classifications and labeling for these 32 substances is March 22, 2027. However, substances and mixtures may be classified, labeled and packaged in accordance with this amendment before this date.
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