Science
Mechanism of Action
This ingredient operates via polymer microspheres that create a 'ball-bearing effect' on the skin's surface, significantly reducing friction and ensuring products glide smoothly and spread evenly. It also functions as an anti-caking agent, preventing particle aggregation in powders. Beyond sensory enhancement, it absorbs excess oil for sebum control, offers optical diffusion for a soft-focus wrinkle correction, and forms a protective film to support the skin's barrier function and moisture retention.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
As a fine polymer powder, airborne dust during manufacturing may present an explosion risk under conditions of poor ventilation. This is a crucial industrial handling consideration, not typically a consumer-facing product characteristic.
The Formula
Formulation
Stability
Highly stable across a pH range of 4-9, HDI/Trimethylol Hexyllactone Crosspolymer is resistant to significant hydrolysis. It is insoluble in water but readily dispersible in oils and various organic solvents. This ingredient is compatible with a broad spectrum of oils and active ingredients, effectively maintaining uniform distribution and preventing product separation.
Synergies
- Compatible with a wide range of oils and active ingredients, enhancing product stability and even distribution.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel issued an 'Insufficient Data Announcement' in 2015, requesting additional safety data, particularly for manufacturing, residual diisocyanate levels, and human repeat insult patch test (HRIPT) data at the highest reported use concentration of 31%. Despite this, a 100% dry powder human patch test showed no dermal irritation. Ocular irritation at 100% in rabbits was attributed to mechanical abrasion, not chemical irritancy. An Australian assessment (AICIS) indicated no unacceptable risk to public health in formulated cosmetic products at concentrations below 20%. It is generally regarded as safe for cosmetic use, remaining primarily on the skin surface. EWG rates it as low concern for various toxicities. While generally well-tolerated, individuals with highly sensitive skin or allergies should exercise caution.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is valuable for its exceptional sensory and aesthetic benefits, providing a silky finish, sebum control, and soft-focus effects, though its full safety profile at concentrations above 20% requires further data as requested by CIR.
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