Hydrogen dimethicone
AKA “Dimethicone Copolymer, Cyclopentasiloxane Copolymer, Silicone Fluid”
Synthetic
Ingredient Facts
Hydrogen dimethicone
AKA: Dimethicone Copolymer, Cyclopentasiloxane Copolymer, Silicone Fluid
Synthetic · Emollient · EWG: 2
Synthetic
Emollient
Occlusive
Skin Conditioner
Silicone
Synthetic
Clean
Creates a lightweight, protective layer on skin or hair to smooth texture and enhance shine without feeling heavy or greasy.
CAS #
68037-59-2, 69013-23-6, 70900-21-9
Form
Liquid
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Creates Protective Barrier
Brightens Skin
Antioxidant Protection
Reduces Inflammation
Traditional Use
Developed in the mid-20th century as a silicone polymer derivative. Used in cosmetics since the 1970s as an emollient and conditioning agent for skin and hair.
Skin Types
●all-skin-types, gentle
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
2
CIR
Safe
Pregnancy
Yes
Restricted By
CIR Safety Findings
ewg-2
pregnancy-nursing-safe
all-shades-safe
Regulatory Agencies
Bis-Isobutyl PEG-13/Dimethicone Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Bis-Isobutyl PEG-24/PPG-7/Dimethicone Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Bis-Isobutyl PEG/PPG-10/7/Dimethicone Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Bis-Methoxy PEG-10 Dimethyl MEA/HDI/Bis-PEG-10 Dimethicone Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrogen dimethicone
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Stearoxymethicone/Dimethicone Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrogen dimethicone
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Stearoxymethicone/Dimethicone Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Feb 2026
Data: CosIng · EWG · CIR