Hydroxypropyl Starch

AKA: Hydroxypropyl starch ether, Hydroxypropyl starch ether pound HPS pound(c)

Synthetic

Clean

OriginDerived from plant starches such as corn, potato, tapioca, or wheat through chemical modification. Modified through hydroxypropylation, where propylene oxide is chemically bonded to starch molecules.

Hydroxypropyl Starch is a propylene glycol ether of starch

CAS #

9049-76-7, 68584-86-1

Form

Powder

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

Functions

Viscosity Controlling

Antioxidant

Boosts Collagen

Controls product thickness

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.

EWG

CIR

Safe as used

Pregnancy

Yes

Concentration Guide

Leave-on0.25–8.2%

Rinse-off0.5–6%

0%50%100%

CIR reported use · 2013 survey

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR