n-hexane discussion

In the European Union, the harmonised classification for n-hexane (EC: 203-777-6, CAS 110-54-3) is being modified from STOT RE 2* (H373) to STOT RE 1 (H372, nervous system) and the specific concentration limit of ≥5% will be deleted; ref: [04.01-ML-014.03] (europa.eu), adoption at the CARACAL session of January 2024. This updated classification will be part of the ATP 22.

This change will have no implications on most n-hexane containing substances, especially those having <5% hexane in their name, in particular:

• • Hydrocarbons, C6, isoalkanes, <5% n-hexane (EC 931-254-9)
  • Hydrocarbons, C6-C7, n-alkanes, isoalkanes, cyclics, <5% n-hexane (921-024-6)
  • Hydrocarbons, C6-C7, isoalkanes, cyclics, <5% n-hexane (926-605-8)

An ESIG one pager is under preparation and will be submitted soon.