On September 25, 2023 the European Commission published regulation (EC) No 2023/2055 amending Annex XVII to Regulation (EC) No 1907/2006 of the European Parliament and of the Council concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) as regards synthetic polymer microparticles (SPM).  The present position paper will discuss how this regulation relates to polymer dispersions and redispersible polymer powders made thereof.