Polyglyceryl-2 Isostearate
AKA: Diglycerol isostearate, Diglyceryl isostearate, Isooctadecanoic acid, Ester with oxybis[propanediol], Ester with oxybis(propanediol)
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Clean
Ester of diglycerol and isostearic acid
Effective at 9.7%
CAS #
73296-86-3, 81752-33-2
Form
Liquid
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Antioxidant Protection
UV Protection
Mixes Oil & Water
Traditional Use
A synthetic ester developed in the 20th century for cosmetic use. Provides emulsifying and solubilizing properties in modern skincare formulations.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Concentration Guide
0.1%
19.3%
0%27%
Reported use
CIR reported use: 0.1-18.8 | 1-19.3
Regulatory Agencies
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
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Verified Jun 2026
Data: CosIng · EWG · CIR