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POLYMETHACRYLIC ACID CROSSPOLYMER.

Valuable CAS 50602-21-6 / ABSORBENT

Polymethacrylic Acid Crosspolymer is a versatile functional ingredient primarily used to enhance product texture and stability. It provides desirable sensory attributes while also offering skin benefits such as moisture retention and sebum control.

Summary

Gelling Agent Thickening Agent Emulsion Stabilizer Film-Forming Agent Texture Enhancer Absorbent

Science

Mechanism of Action

This ingredient functions by forming transparent aqueous gels, acting as an efficient gelling and thickening agent to optimize product consistency and feel. It serves as an emulsion stabilizer, preventing the separation of oil and water phases and extending product shelf life. On the skin, it forms a thin, flexible film that aids in moisture retention, helps protect the skin's barrier, and reduces transepidermal water loss. As a texture enhancer, it imparts a smooth, silky, and non-sticky finish, improving product spreadability. Its absorbent properties allow it to absorb significant amounts of water and oil, thereby controlling excess sebum and shine for a matte appearance. It also plays a role in stabilizing and uniformly distributing various active ingredients within a formulation.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 2 – 8
0 7 14

Stability

A pre-neutralized powder, this ingredient is adaptable to both cold and hot processing methods. It demonstrates robust stability across a wide pH range of 2 to 8 and exhibits high resistance to electrolytes, maintaining its viscosity even when formulated with up to 10% salt.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) has deemed Polymethacrylic Acid Crosspolymer (including its form, Polyacrylate Crosspolymer-6) safe for use in cosmetics when properly formulated to be non-irritating. Dermal irritation studies on rabbits showed no irritation at concentrations exceeding 90%, and Human Repeat Insult Patch Tests (HRIPT) indicated it was non-sensitizing at approximately 5%. While some in vitro studies suggested slight ocular irritation, it was predicted to be non-irritant at 2%. Regulatory bodies like the U.S. FDA and the European Chemicals Agency (ECHA) have evaluated this ingredient, concluding it is non-toxic and non-irritating under intended cosmetic use conditions.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Polymethacrylic Acid Crosspolymer is a valuable multifunctional ingredient, enhancing product stability and texture while providing beneficial skin properties, making it suitable and well-tolerated across all skin types.

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