Siloxane D4 and D5 Now Prohibited in Rinse-Off Cosmetics

EU Regulation 2018/35 modifying Annex XVII of Regulation (EC) No. 1907/2006 took effect on February 1.

The regulation immediately restricts the marketing and sale of two siloxanes (octamethylcyclotetrasiloxane: D4 and decamethylcyclopentasiloxane: D5) in a concentration equal to or greater than 0.1% by weight in rinse-off cosmetics. That’s as good as a total prohibition.

Two years ago, the ECHA’s Member State Committee (MSC) approved the classification of siloxane D4 and D5 as substances of very high concern (SVHC).

Both substances are also classified as persistent, bioaccumulative, and toxic (PBT: Article 57d) and as very persistent and very bioaccumulative (vPvB: Article 57e).

Two ECHA committees, the Risk Assessment Committee (RAC) and the Committee for Socio-Economic Analysis (SEAC) Committee, informed the EU of their opinions on August 2016.

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