C30-45 Alkyl Dimethicone

C30-45 Alkyl Dimethicone molecular structure
molecular structure · PubChem
AKA: Silicone
Synthetic
Skin Conditioner
Silicone
Clean
OriginC30-45 Alkyl Dimethicone is synthesized from dimethicone, a silicone polymer derived from silica and methyl chloride. It is produced through alkylation, where long-chain alkyl groups are chemically bonded to the dimethicone backbone.
Poly[oxy(dimethylsilylene)],.alpha.-(C30-45)-alkyldimethylsilyl-,.omega.-(C30-45)-alkyloxy-
CAS #
243137-49-7
Form
Liquid
Skin Types
●all-skin-types, gentle
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed4 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 807)
Mixed Eye Irritation Results
1 study / 1 mixed / reactions slight (CIR 807)
Concentration Guide
Leave-on0.16–5.1%
Rinse-off0.5%
0%50%100%
CIR reported use · 2019 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR