Sodium Hydroxypropyl Starch Phosphate ●
TL;DR. This ingredient is a rheology modifier that thickens water-based formulas, helps stabilize emulsions, and adds a soft, powdery feel. It can also improve slip and absorb excess oil or shine in creams, gels, sunscreens, and complexion products.
What does Sodium Hydroxypropyl Starch Phosphate do in a cosmetic formula?
This ingredient is a rheology modifier that thickens water-based formulas, helps stabilize emulsions, and adds a soft, powdery feel. It can also improve slip and absorb excess oil or shine in creams, gels, sunscreens, and complexion products.
Is Sodium Hydroxypropyl Starch Phosphate clean?
This ingredient is generally low concern in clean-beauty frameworks, with low sensitization potential and little restricted-list friction. The main quality point is supplier control of processing residues from the chemical modification step.
Is Sodium Hydroxypropyl Starch Phosphate sustainable?
This material is typically made from renewable plant polysaccharides, with crop source varying by supplier. It is expected to be readily biodegradable, and its overall footprint depends mostly on agricultural sourcing and processing controls.
Is Sodium Hydroxypropyl Starch Phosphate COSMOS-approved?
It is generally permitted in COSMOS-natural and COSMOS-organic formulations when made through allowed derivatization routes and with compliant auxiliaries. From a Green Chemistry view, it scores well for renewable feedstock and biodegradability, with a smaller caveat around chemical modification.
How does Sodium Hydroxypropyl Starch Phosphate work chemically?
The molecule is an anionic, crosslinked polysaccharide ether and ester with hydroxyalkyl and it substituents, which helps it hydrate into a shear-thinning network. Typical use is about 0.5% to 5% as a viscosity builder, stabilizer, absorbent, or sensory modifier, and it is usually compatible with mildly acidic to neutral cosmetic systems.
Last updated 2026-05-15