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Moumoujus

HYDROXYPROPYL STARCH PHOSPHATE.

Valuable CAS 53124-00-8 / 39346-84-4 / 113894-92-1 / BULKING, VISCOSITY CONTROLLING

Hydroxypropyl Starch Phosphate is a versatile starch derivative primarily utilized for its ability to enhance product texture and consistency. It functions as a robust emulsion stabilizer and provides demonstrable benefits to the skin, including improved hydration and a mattifying effect.

Summary

Viscosity Modulator Emulsion Stabilizer Masking Agent Absorbent Astringent Skin Smoother Binder

Science

Mechanism of Action

This modified starch acts as a thickening agent, imparting a desirable consistency to cosmetic formulations. On the skin, it forms a lightweight, moisture-locking barrier, thereby reducing transepidermal water loss and promoting enhanced hydration. Its starch-based structure also confers absorbent properties, allowing it to effectively manage excess oil, which can result in a refined, non-greasy, and potentially mattified skin finish.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 A 0.5% effective concentration of Hydroxypropyl Starch Phosphate, when incorporated into a conditioner, demonstrated no irritant potential in a 24-hour single occlusive patch test (15 subjects) and no sensitizing potential in a human repeated insult patch test (104 subjects).

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 9
0 7 14

Stability

This ingredient maintains stability within emulsion systems across a broad pH range of 3 to 9 and exhibits robust performance over temperatures from -30°C to 50°C. While stable across this range, its efficacy may decrease in highly alkaline conditions. Its non-ionic nature allows for compatibility with a diverse array of components, including up to 20% electrolytes.

Synergies

  • Enhanced stability with high electrolyte concentrations

Conflicts

  • Performance diminishes in highly alkaline pH environments

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Hydroxypropyl Starch Phosphate safe for cosmetic use under current practices. Concentrations between 3% and 10% are specifically cited by CIR as safe, with no adverse safety concerns noted within this range. Extensive testing indicates a low risk of irritation and sensitization.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Hydroxypropyl Starch Phosphate is a valuable multi-functional ingredient, enhancing product aesthetics through texture modification and stabilization, while also offering direct skin benefits like hydration and oil control, all with an excellent safety profile.

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