Watch-out database → Detailed ingredient information:

Octamethylcyclotetrasiloxane (D4) / CYCLOTETRASILOXANE

CAS Nr.

556-67-2

Restricted as per EC regulation 1223/2009?

Yes

Entries

II/1388

Other observations

CMR 2 – Toxic for reproduction

Silicone

Date of update Deadline Content of update Reference Source Obelis articles
22/05/2019 13/06/2019 D4 has been added to Annex II to the EU Cosmetics Regulation. Hence, its use is prohibited in cosmetic products. The only case, when D4 can be present in a cosmetic product formulation is when it is technically unavoidable when following good manufacturing practices. Commission Regulation (EU) 2019/831 EC Silicones on the spot again
Newly banned ingredients under the EU Cosmetics Regulation
10/01/2018 31/01/2020 D4 shall not be placed on the market in wash-off cosmetic products in a concentration ≥ 0.1%. Commission Regulation (EU) 218/35 EC Cyclopentasiloxane (D5) and Cyclotetrasiloxane (D4) restricted in the EU