Glyceryl Isostearate

AKA: Glyceryl monoisostearate, Glycerol monoisostearate, 66085-00-5, Glycerin monoisostearate, NIKKOL MGIS, GLYCEROISOSTEARATE, Isooctadecanoic acid, Monoester with 1, 2, 3-propanetriol
Plant-Derived
Emollient
Cleanser
Emulsifier
Skin Conditioner
Not Clean
Isooctadecanoic acid, monoester with glycerol
Formula
C21H42O4
Mol. Weight
358.60
CAS #
66085-00-5, 32057-14-0
Form
Liquid
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Locks In Moisture
Traditional Use
Synthetic ester created as an emollient and emulsifier in cosmetics. Designed to provide the benefits of stearic acid in a more effective, branched-chain form for better skin feel.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Skin Types
all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing
🛡️Safety-assessed3 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR