Snapshot
- Overview
- A modified starch that thickens formulas and improves their feel.
- Category
- Emulsifying
- Type
- Thickener
Sodium Carboxymethyl Starch
Sodium carboxymethyl starch is a water-soluble, modified starch polymer made by introducing carboxymethyl groups to a starch backbone. It's used to thicken formulas, stabilize dispersed phases, and improve product spread and feel.
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Our take
Is Sodium Carboxymethyl Starch a Good Ingredient?
It earns a Great rating as a well-established, water-soluble thickener that reliably stabilizes viscosity and texture, with low irritation potential and good formulation stability across typical cosmetic pH ranges.
What it does
Skin Benefits
It adds a plush, uniform glide and reduces runniness, helping applications feel controlled, and contributes to a smoother, more cushioned skin feel without heaviness.
Where you'll find it
Uses in Skincare & Cosmetics
It's used in creams, lotions, and cleansing gels to build body and keep texture consistent during storage and use.
Before you use it
Safety
It's generally well tolerated; irritation is uncommon but possible for very sensitive skin, especially in high-use rinse-off products. No notable regulatory restrictions apply at normal cosmetic levels.
