Isododecane

Isododecane molecular structure
molecular structure · PubChem
AKA: 2-Methylundecane, 7045-71-8, Undecane, 2methyl
Synthetic
Emollient
Fragrance
Solvent
Skin Conditioner
Clean
2,2,4,6,6-Pentamethylheptane; Hydrocarbons, C4, 1,3-butadiene-free, polymd., triisobutylene fraction, hydrogenated
Formula
C12H26
Mol. Weight
170.33
CAS #
31807-55-3, 93685-81-5, 13475-82-6
Form
Liquid
Functions
Perfuming
Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Locks In Moisture
Traditional Use
Synthetic hydrocarbon created in the mid-20th century as a volatile silicone alternative. Used in cosmetics as a lightweight emollient and carrier fluid with no traditional counterpart.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR