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Polymers are exempt from the registration and evaluation under REACH according to “ECHA Guidance for monomers and polymers; April 2012; Version 2.0”. A substance is considered a Polymer if the following criteria apply:

  • 3M+1 rule: Polymer molecules contain a sequence of at least 3 monomer units, which are covalently bound to at least one other monomer unit or other reactant
  • > 50 % by weight consists of polymer molecules
  • < 50 % by weight of polymer molecules present the same molecular weight

LAUS can determine if your substance is a polymer per ECHA definition:

  • Molecular Weight Distribution by Gel Permeation Chromatography (GPC)


Monomers have to be registered in accordance with the normal registration obligation under REACH. Please find more information here.

We also offer analytical evaluation to determine the weight percent of monomer substance(s) or other substance(s) in the form of monomeric units, or substances chemically bound to polymer molecules:

  • Mass Spectrometry
  • Gas Chromatography
  • FTIR spectroscopy (Matching with Polymer Data Bank)
  • Nuclear Magnetic Resonance spectroscopy


In Korea (K-REACH) registration is required for all polymers. They are divided into two groups: PLCs (Polymers of Low Concern) need an exemption dossier and non-PLCs need a full dossier according to K-REACH requirements.

LAUS can support you with studies for the characterization of your polymer and for dossier endpoints.


Don’t hesitate to contact us to receive a proposal for testing of your polymers.

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