Cyclopentasiloxane (D5) may also be harmful to the environment and the European Commission published an update in January 2018 amending Annex XVII of REACH Regulation (EC) No 1907/2006.
After January 31, 2020, the concentration of D4/D5 in cosmetic products placed on the market and rinsed off after application should be less than 0.1% by weight of both substances. This has now been modified to include cyclohexasiloxane (D6) and it is expected that the restriction will be extended to include leave-on products.
For more information click: IOTA D6 cyclohexasiloxane-cosmetic silicone oil manufacturer (personalcaresilicone.com)
