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From 24 April 2024 there will be changes to categorisation, reporting & record keeping requirements - see announcements on changes to the General Rules & changes to the Categorisation Guidelines.

Polymer molecular weight details

of an industrial chemical that is a polymer, means the following: 

  • the number average molecular weight of the industrial chemical
  • the weight average molecular weight of the industrial chemical
  • the polydispersity index for the industrial chemical
  • the percentage (by mass) of molecules with a molecular weight that is less than 1,000 g/mol
  • the percentage (by mass) of molecules with a molecular weight that is less than 500 g/mol.
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