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POLYVINYLACETAMIDE.

Insufficient Data CAS - / VISCOSITY CONTROLLING

POLYVINYLACETAMIDE (PNVA) is a water-soluble polymer primarily utilized in skincare to enhance product texture and stability. It functions as a thickening agent, contributing to a luxurious feel, while also forming a protective film on the skin to support hydration.

Summary

Thickening Agent Hydrophiling Agent Dispersing Agent Film-forming Agent Moisturizer Humectant

Science

Mechanism of Action

On the skin, PolyvinylacetAMIDE forms a protective, hydrophilic barrier that effectively minimizes transepidermal water loss (TEWL). This barrier helps to retain moisture within the skin, thereby contributing to its moisturization. Beyond its epidermal benefits, PNVA acts as a thickening agent in formulations, improving viscosity and overall product stability.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 2 – 14
0 7 14

Stability

Poly(N-vinyl acetamide) demonstrates exceptional stability across a broad pH range of 2 to 14, exhibiting resistance to both acids and alkalis. Its thickening properties remain consistent even at elevated temperatures and in the presence of salts like sodium chloride, outperforming many common polymers. It withstands temperatures up to 360°C without decomposition and is typically supplied as an aqueous solution.

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Unknown

As of current research, POLYVINYLACETAMIDE has not undergone specific safety assessments by the Cosmetic Ingredient Review (CIR) or the Scientific Committee on Consumer Safety (SCCS). While other polyvinyl polymers like Polyvinyl Alcohol have established safety profiles, these do not directly apply to PNVA (CAS: 28408-65-3), indicating a gap in specific safety data for cosmetic use.

Your Skin

Skin Compatibility

No Normal
Yes Dry
No Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Insufficient Data

POLYVINYLACETAMIDE offers valuable formulation benefits as a highly stable thickening agent with moisturizing properties, yet a definitive safety verdict is currently limited by the absence of specific CIR or SCCS safety assessments for cosmetic use.

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