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Hydroxypropyl Starch Phosphate
AKA “DIHYDROGEN PHOSPHATE”
Synthetic
Ingredient Facts
Hydroxypropyl starch phosphate
AKA: DIHYDROGEN PHOSPHATE
Synthetic · Bulking · EWG: 5
Plant-Derived Synthetic
Synthetic
Clean
A natural thickener derived from plant starch that gives products their smooth, creamy texture while helping them glide on evenly.
Formula
H2O4P-
Mol. Weight
96.987
CAS #
53124-00-8, 39346-84-4, 113894-92-1
Form
Powder
See origin →
Functions
Bulking
Thickener
Adds Body & Volume
Controls Viscosity
Adds volume
Controls product thickness
Traditional Use
Phosphoric acid salt, a modern synthetic ingredient developed in the 19th century for industrial use; adopted in cosmetics as a pH buffer and chelating agent.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
5
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR