Sodium Oxidized Starch Acetate/Succinate
AKA “Modified Starch, Starch Derivative”
Humectant
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Ingredient Facts
Sodium oxidized starch acetate/succinate
AKA: Modified Starch, Starch Derivative
Humectant · Humectant · EWG: 4
Synthetic
Humectant
Occlusive
Skin Conditioner
Hair Care
Not Clean
Sodium Oxidized Starch Acetate/Succinate is the product of the esterification of oxidized starch with acetic acid and succinic acid anhydrides
CAS #
-
Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks In Moisture
Traditional Use
Developed in the 20th century as a modified starch derivative. Used in modern cosmetics as a thickening and stabilizing agent with no traditional precedent.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
Dermal absorption: 2%. Source: CIR Safety Assessment (CIR Seq 680).
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR