At a glance
- CAS number
- 113894-92-1
- INCI name
- Hydroxypropyl Starch Phosphate
- Function
- thickener, film_former, emulsifier, emollient
- Typical use level
- 0.5%–10%
- Solubility
- water
- Stable pH
- 4–8
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Also known as
HPS Phosphate Modified Starch Phosphate Hydroxypropylated Starch Phosphate Structure XL Dry Flo
Compatibility
Works well with:
Glycerin Niacinamide Hyaluronic Acid Carbomer Xanthan Gum Panthenol
Use caution with:
High concentrations of ethanol
Hydroxypropyl Starch Phosphate is generally well tolerated across a broad range of cosmetic co-ingredients and is compatible with most electrolytes, humectants, and mild surfactants. High levels of alcohol (above ~30%) can disrupt its swelling behavior and reduce thickening efficacy. It should be dispersed in water under moderate agitation before heating to avoid lumping.
Formulation notes
Hydroxypropyl Starch Phosphate is a chemically modified corn or potato starch used primarily as a rheology modifier, thickener, and stabilizer in aqueous and emulsion systems. It imparts a smooth, powdery, non-tacky skin feel and can improve the spreadability of creams, lotions, and color cosmetics. It is also used as a natural-origin alternative to synthetic film formers and is valued for its skin-conditioning and oil-absorption properties.
Related ingredients
- Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate CopolymerThickener
- Hydroxypropyl MethylcelluloseThickener
- Arachidyl AlcoholEmollient
- Behenyl AlcoholEmollient
- Cetearyl AlcoholEmulsifier
- Cetyl AlcoholEmollient