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HEA SUCCINATE.

Valuable CAS 50940-49-3 / NAIL CONDITIONING

HEA Succinate, scientifically known as Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, is a versatile polymer engineered to enhance the sensorial experience and stability of skincare formulations. It primarily functions as a thickener and emulsion stabilizer, creating desirable textures from light serums to rich creams, while contributing to the skin's moisture balance.

Summary

viscosity controlling emulsion stabilising rheology modifying texturing agent thickener dispersing agent opacifying agent skin conditioning (hydration)

Science

Mechanism of Action

This sophisticated copolymer functions predominantly as a rheology modifier, significantly increasing formulation viscosity to achieve desired textures, ranging from light gels to luxurious creams. It stabilizes oil-in-water emulsions, effectively preventing phase separation to ensure product integrity. Beyond its structural roles, HEA Succinate forms a lightweight, non-tacky gel network on the skin, enhancing hydration and supporting moisture retention. It also improves product spreadability through pseudoplastic flow, facilitating even application and a smooth, elegant skin feel, while acting as a dispersing and opacifying agent. Some research suggests it can create an 'invisible shield' to help protect the skin barrier.

Research

Clinical Evidence

High confidence
Effective range 0.1–3%
Optimal

For optimal thickening and stabilization across various cosmetic preparations, a concentration between 0.2% and 2.0% by weight is generally preferred. Specific applications vary, such as 0.5-1.0% for clear serums and 1.0-1.5% for moisturizing gels.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 12
0 7 14

Stability

HEA Succinate demonstrates exceptional stability across a very wide pH range from 3 to 12. It is tolerant to heat, though temperatures exceeding 80°C should be avoided. The ingredient also exhibits excellent electrolyte compatibility and can be effectively incorporated into formulations containing up to 50% ethanol and up to 20% oil.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
3.6%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has assessed HEA Succinate and related polymers, concluding their safety for use in cosmetics. Human studies have reported it as non-irritating and non-sensitizing. Its large molecular weight suggests negligible skin absorption, aligning with its favorable safety profile. While the highest reported maximum concentration in leave-on products is 3.6%, safety assessments often recommend limiting typical use to 3% for such applications.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

HEA Succinate is a valuable multi-functional polymer that significantly enhances product texture, stability, and spreadability across a wide range of cosmetic formulations, while offering mild hydrating benefits.

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