The harmonized classification and labeling of hazardous substances is outlined in Regulation (EC) No 1272/2008, enacted by the European Parliament and Council on December 16, 2008, concerning the classification, labeling, and packaging of substances and mixtures (CLP). This classification is regularly updated through an “Adaptation to Technical Progress” (ATP). The latest update, known as the 21st ATP, was published on January 5, 2024, in the Official Journal of the European Union, titled “Commission Delegated Regulation (EU) 2024/197 of October 19, 2023, amending Regulation (EC) No 1272/2008 regarding the harmonized classification and labeling of certain substances.”
In the 21st ATP, the EU sanctioned a set of harmonized classification updates proposed between March and November 2021. This ATP introduces 28 new substances and includes 24 amendments, with no substances being deleted. Certain classifications feature specific M-factors, concentration limits, and substance ATE values as part of the comprehensive classification.
The ATP will come into effect on January 25, 2024; however, the new classifications will be applicable starting September 1, 2025. Suppliers may choose to classify, label, and package substances and mixtures according to the new classifications before this effective date.