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Isododecane
AKA “2-Methylundecane, Undecane, EINECS 230-323-4, RefChem:476305, DTXCID5021590”
Synthetic
Ingredient Facts
Isododecane
AKA: 2-Methylundecane, Undecane, EINECS 230-323-4, RefChem:476305, DTXCID5021590
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Fragrance
Solvent
Skin Conditioner
Synthetic
Clean
A lightweight oil that glides smoothly onto skin, locking in moisture while helping other ingredients blend seamlessly into your product.
Formula
C12H26
Mol. Weight
170.33
CAS #
31807-55-3, 93685-81-5, 13475-82-6
Form
Liquid
See origin →
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.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
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Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR