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Moumoujus

STYRENE/DVB CROSSPOLYMER.

Valuable CAS 9003-70-7 / FILM FORMING, OPACIFYING

Styrene/DVB Crosspolymer is a meticulously engineered, cross-linked polymer structured to form a three-dimensional network. This versatile ingredient primarily functions as a film-former and opacifying agent, also contributing absorbent properties to cosmetic formulations.

Summary

film forming opacifying absorbent

Science

Mechanism of Action

Due to its substantial molecular architecture, Styrene/DVB Crosspolymer remains on the skin's surface, forming a non-penetrating film. This surface film enhances product adherence and contributes to a refined skin appearance, while its inherent porous structure can absorb excess surface oils.

Research

Clinical Evidence

Low confidence
Effective range 1–10%
Optimal

N/A

Key findings

  1. 01 Enhances adherence in makeup powder products, including mineral makeup and foundation powders.

Transparency

Dusting Analysis

Not commonly dusted

As a powder ingredient frequently incorporated into makeup powders (such as foundation and mineral makeup), Styrene/DVB Crosspolymer is designed to improve product adherence to the skin, making 'dusting' in the negative sense highly unlikely for its intended applications.

The Formula

Formulation

Solubility
Unknown
Optimal pH 5.5 – 8
0 7 14

Stability

This polymer is stable and exhibits heat tolerance. For optimal shelf-life, it should be stored at room temperature, shielded from direct sunlight or heat, and kept in a tightly sealed container. The recommended pH range for product formulations is between 5.5 and 8.0.

Conflicts

  • strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
10%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed its safety under current cosmetic use and concentrations, noting that its large molecular size precludes percutaneous absorption. Concerns regarding residual styrene monomer are addressed by ensuring levels are minimized in compliant grades, falling well below levels of concern. EWG rates this ingredient with low concern for cancer, allergies & immunotoxicity, and developmental and reproductive toxicity. The SCCS did not issue an opinion on *nano* styrene/acrylates copolymers (a related ingredient) due to its functions as film forming, opacifying, and viscosity controlling.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Styrene/DVB Crosspolymer is a valuable and safe ingredient for cosmetic formulations, particularly in powder products, where it enhances adherence and provides opacifying and absorbent benefits without skin penetration.

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