REACH: Annex XVII for octamethylcyclotetrasiloxane ("D4") and decamethylcyclopentasiloxane ("D5")

On 10/01/2018 the Regulation (EU) 2018/35 was published, which modifies Annex XVII of REACH, introducing substances D4 and D5.

A risk to the environment arises from the presence of D4 and D5 in certain cosmetic products that are washed off with water after application, because of their hazard properties as a PBT and a vPvB substance in the case of D4 and a vPvB substance in the case of D5.

The concentration limit of 0,1 % set by this restriction effectively ensures that all intentional use of D4 and D5 will cease since those substances must be present in wash-off cosmetic products in a much higher concentration to perform their intended function.

• Octamethylcyclotetrasiloxane (D4) CAS No 556-67-2 EC No 209-136-7, Decamethylcyclopentasiloxane (D5) CAS No 541-02-6 EC No 208-764-9 : Shall not be placed on the market in wash-off cosmetic products in a concentration equal to or greater than 0,1 % by weight of either substance, after 31 January 2020.

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