Ammonium Isostearate
AKA “RefChem:557757, DTXCID501506686”
Synthetic
Ingredient Facts
Ammonium isostearate
AKA: RefChem:557757, DTXCID501506686
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Emulsifier
Plant Oil
Synthetic
Clean
A gentle plant-derived cleanser that removes oil and dirt while helping blend ingredients together for a smooth, even texture.
Formula
C18H39NO2
Mol. Weight
301.50
CAS #
191880-49-6
See origin →
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Removes Impurities
Cleansing Surfactant
Emulsifier
Reduces Inflammation
Locks In Moisture
Mixes Oil & Water
Traditional Use
A synthetic salt of isostearic acid developed in the 20th century for use as an emulsifier and opacifying agent. No traditional use history; created for modern cosmetic formulation needs.
Skin Types
●all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR