On 4 September 2023, ECHA started a 45 day public commenting period on 10 testing proposals for the following substances:

1. 3,4-dihydroxy-1-[(Z)-octadec-9-enyl]pyrrolidine-2,5-dione

2. 3-mercaptopropionic acid

3. Benzenesulfonic acid, mono- and dialkylation products with C16-20 (even numbered, branched and linear) olefins, magnesium salts, magnesium carbonate, overbased, including distillates (petroleum), hydrotreated, solvent-refined, solvent-dewaxed, or catalytic dewaxed, light or heavy paraffinic C15-C50

4. Reaction mass of 1-methyl-4-(1-methylethylidene)cyclohexyl acetate and p-menth-1-en-8-yl acetate

5. Reaction mass of 3-(4-methyl-3-pentenyl)cyclohex-3-ene-1-carbaldehyde and 4-(4-methyl-3-pentenyl)cyclohex-3-ene-1-carbaldehyde

6. Styrene