Trehalose Isostearate Esters
AKA “Trehalose Isostearate
Emollient
Ingredient Facts
Trehalose isostearate esters
Emollient · Emollient · EWG: 4
Plant-Derived
Emollient
Skin Conditioner
Not Clean
Trehalose Isostearate Esters is the product obtained by the esterification of isostearic acid and Trehalose
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
Traditional Use
A modern synthetic ester created in the late 20th century by esterifying trehalose, a natural disaccharide, with isostearic acid. Developed for cosmetics as a skin-conditioning and texture-enhancing agent with humectant properties.
Skin Types
all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR