Cyclosiloxanes - Information Center

Statement - Silicones industry says D4 & D5 are safe in their intended uses

News published on 21 April 2015 Download document Read more


Brussels (21st April 2015) - The following statement can be attributed to the Global Silicones Council (GSC) further to the United Kingdom’s proposal to restrict the use of octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) in wash off personal care products.

The safety of D4 and D5 in personal care products has been established by independent expert panels, including the European Scientific Committee for Consumer Safety, the United States Cosmetics Review Panel, and Health Canada.

“Environmental monitoring data voluntarily collected by the global silicones industry and governmental regulatory agencies demonstrate that D4 and D5 are not and will not be found at levels that pose a risk to the environment”, commented Dr. Pierre Germain, Secretary General of CES – Silicones Europe.

ECHA’s Member States Committee is expected to make a final decision on whether D4 and D5 meet the PBT1 criteria under the European Union’s chemicals management program (REACH) in the coming days.

The GSC acknowledges the extensive work done by the United Kingdom as well as by the Netherlands as rapporteur for the Member States Committee, in assessing D4 and D5. Silicones Europe understands that current REACH criteria were not meant for silicon-based substances and therefore over-predict their potential bioaccumulation and concentration in the environment.

Furthermore, Environment Canada, having reviewed the environmental data available for D4, has not imposed any product concentration restrictions on the use of D4 in any application. In addition, a comprehensive, risk-based assessment of the data conducted by an independent, group of leading scientific experts selected by the Canadian Government concluded that D5 does not pose a risk to the environment.

We do not believe that D4 and D5 are PBT or vPvB 2  as demonstrated by the latest scientific information of these substances and their behavior in the environment. The silicones industry will seek to continue to work collaboratively with the authorities in an effort to help ensure that regulatory decisions incorporate assessment of actual risk and do not unnecessarily impact innovation, job-creation, and economic growth.

1 Persistent, Bioaccumulative, Toxic (PBT)
2 (very) Persistent, (very) Bioaccumulative and/or Toxic (vPvB)

About the GSC:
The Global Silicones Council (GSC) is a not-for-profit, international organization representing companies that produce and sell silicone products around the world. The GSC brings together all the major global manufacturers via the three Regional Silicone Industry Associations in North America (Silicones Environmental, Health, and Safety Center – SEHSC), Europe (Silicones Europe – CES), and Japan (Silicones Industry Association of Japan – SIAJ), and encourages their cooperation and collaboration. The GSC’s role is to promote the safe use and stewardship of silicones globally.

Media contact:
Dr. Pierre Germain
Secretary General
CES – Silicones Europe
T  +32 (2) 676 73 77

North America
Karluss Thomas
Executive Director
T  +1 (202) 249 6197

Hideshi Kurihara
Secretary General
T  + 81 (3) 3592 1671