Europe - The CLP comes up to date: the 23rd ATP has been published

The 23rd ATP: Status of the Regulation

On 25 September 2024, the European Commission published a draft proposal of what will become the 23rd ATP (Adaptation to Technical Progress), offering a preview of the changes to Reg. 1272/2008 that will be enacted in the future.

More information about the 23rd ATP is now available as Delegated Regulation (EU) 2025/1222 was officially published in the Official Journal of the European Union on 20 June 2025.

The 23rd ATP: What's New?

The 23rd ATP aims to amend Table 3 of Part 3 of Annex VI of the CLP Regulation by introducing 24 new harmonised classifications and amending 10 pre-existing entries.

Some of the entries introduced by the 23rd ATP:

• Ozone (CAS: 10028-15-6)
• Dinitrogen oxide (CAS: 10024-97-2)
• Fluoroethylene (CAS: 75-02-5)

Some of the entries modified by the 23rd ATP:

• 2-phenylpropene; α-methylstyrene (CAS: 98-83-9)
• 1,1-dichloroethylene; vinylidene chloride (CAS: 75-35-4)

The 23rd ATP: When?

The 23rd ATP will apply from 1 February 2027, but can be applied on a voluntary basis from 10 July 2025.

Traceone has already planned the analysis of the 23rd ATP and will keep you updated on it.

To consult the 23rd ATP, click on this link:

• DELEGATED REGULATION (EU) 2025/1222