UV Filter Booster
SunBoost-PHS
INCI: Polyhydroxystearic Acid
Formulator notes
Polyhydroxystearic acid: a dispersant for TiO₂ and ZnO that also forms films, gels oils and raises SPF. Use 1-3%.
Open in the SPF Lab An in-silico simulator over the Sunbest range, pre-loaded with this filter.
Highlights
- Dispersant / surface modifier for inorganic pigments (TiO₂, ZnO); also an emulsion stabiliser, oil-gelling agent, film-former and SPF enhancer.
- Polymeric fatty acid with pendant hydroxyls: the hydrophobic backbone anchors to oils and mineral surfaces; the hydroxyls give steric stabilisation.
- Gels oils at higher levels to create anhydrous sticks or modify cream rheology.
Technical data
| INCI name | Polyhydroxystearic Acid |
|---|---|
| Also known as | PHS, PHSA |
| IUPAC name | octadecanoic acid, 12-hydroxy-, homopolymer |
| CAS number | 27924-99-8 |
| EC number | 608-150-4 |
| HSN code | 38249990 |
| Type | UV Filter Booster |
| Form | Powder |
| Solubility | Insoluble in water; dispersible in oils and organic solvents; acts as an oil-phase dispersant/film former. |
| Typical dosage | 1-3% |
| UV profile | - |
| UV band | SPF booster |
| Pack size (kg) | 25 |
| MOQ (kg) | 300 |
| Shelf life (years) | 2-3 |
| REACH registered | No |
| REACH regions | - |
Applications
- Sunscreens & SPF Products
Frequently asked
What is SunBoost-PHS?
SunBoost-PHS is UV filter booster, INCI name Polyhydroxystearic Acid (CAS 27924-99-8), supplied by Vinner Labs for sunscreens & SPF products.
What is the typical use level of SunBoost-PHS?
The typical dosage of SunBoost-PHS is 1-3% in finished formulations. Exact levels depend on the application and regional regulations.
What is SunBoost-PHS soluble in?
SunBoost-PHS is soluble in: Insoluble in water; dispersible in oils and organic solvents; acts as an oil-phase dispersant/film former..
Related ingredients
Samples & documentation
Request a sample, spec sheet, quotation or regulatory statement for SunBoost-PHS, ask a specialist.
Your request goes to the Vinner Labs team in Hyderabad, and a person on the team replies, usually within one business day.
Spec sheets, certificates of analysis and regulatory statements for SunBoost-PHS are shared on request. Regulatory status varies by market and is confirmed for your region in the reply.