Monday, August 29, 2016SCCS

D5: the SCCS revises its Opinion

© CosmeticOBS-L'Observatoire des Cosmétiques

On March 25, 2015, the SCCS had adopted an Opinion on the cosmetic ingredient Cyclopentasiloxane (D5). This Opinion has been revised on 29 July 2016, and has just been published. It is now its final version.

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Cyclopentasiloxane (D5) (CAS: 541-02-6, EC: 208-764-9) is widely used in cosmetic products.
In June 2010, the Scientific Committee for Consumer Safety (SCCS) assessed the consumers risks associated with the use of D5 in combination with its isomer D4 (Cyclomethicone, Octamethylcyclotetrasiloxane, CAS: 556-67-2), a substance that has been classified as a CMR 2 substance (Carc. 2) under Regulation 1272/2008.
Upon request of the European Commission, in January 2014 Cosmetic Europe submitted a safety assessment specifically dedicated to D5 in cosmetic products.

For exhaustive background information, see the articles
Cyclopentasiloxane: Opinion of the SCCS (May 26, 2015)
SCCS: 7 requests for scientific Opinions (April 24, 2014)


In bold, the modified parts

 1. On the basis of the data provided does the Scientific Committee on Consumer Safety (SCCS) consider Cyclopentasiloxane (D5) safe as cosmetic ingredient?

The SCCS considers that the use of Cyclopentasiloxane (D5) in cosmetic products is safe at the reported concentrations, except for use in body lotion and hair styling formulations aerosols and in those product forms that can give rise to lung exposure of the consumer through inhalation, e.g. aerosols, pressurised sprays, powders, etc sun care spray products .
This is because Margin of Safety based …

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