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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.


means a chemical that consists of molecules that: 

  • are characterised by the sequence of one or more types of monomer units; and 
  • are distributed over a range of molecular weights where the difference in molecular weights is primarily attributable to differences in the number of monomer units; and 
  • greater than 50% by weight of which have a sequence of at least 3 monomer units covalently bound to at least one other: 
    • monomer unit; or 
    •  molecule that is linked to one or more sequences of monomer units but cannot, under the conditions of the relevant reaction used for the particular process of polymer formation, become a repeating unit in the polymer structure.

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