Sodium Carboxymethyl Starch
molecular structure · PubChem
AKA: SODIUM STARCH GLYCOLATE (II), SODIUM STARCH GLYCOLATE [II], SODIUM STARCH GLYCOLATE (MART.), SODIUM STARCH GLYCOLATE [MART.], Sodium starch glycolate type a, SODIUM STARCH GLYCOLATE TYPE A (USP-RS), SODIUM STARCH GLYCOLATE TYPE A [USP-RS], SODIUM STARCH GLYCOLATE TYPE A POTATO (II), SODIUM STARCH GLYCOLATE TYPE A POTATO [II], SODIUM STARCH GLYCOLATE (TYPE A) (EP MONOGRAPH)
Synthetic
Occlusive
Emulsifier
Clean
Starch, carboxymethylether, sodium salt
Formula
C11H14FNO3S
Mol. Weight
259.30
CAS #
9063-38-1
Form
Powder
Functions
Binding
Emulsion Stabilising
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Viscosity Controlling
Anti-Inflammatory
Antimicrobial
Fights Acne
Traditional Use
Developed in the mid-20th century as a modified starch derivative. Used in cosmetics as a thickening and suspending agent, derived from starch sources that have been chemically modified with carboxymethyl groups.
EWG
1
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
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR