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Moumoujus

SODIUM STEARYL FUMARATE.

Valuable CAS 4070-80-8 / BULKING

Sodium Stearyl Fumarate is a highly versatile excipient that optimizes the stability and texture of precision skincare formulations. It functions as an effective emulsifier and binder, ensuring uniform product integrity and a refined sensory experience on the skin.

Summary

emulsifying texture enhancer viscosity controlling

Science

Mechanism of Action

This ingredient primarily operates by stabilizing mixtures of oils and water, acting as an emulsifier to prevent phase separation and maintain emulsion integrity. It also contributes to product texture as a binder and processing agent, ensuring consistency. Its noted hydrophilic lubricant qualities can further enhance the skin feel of cosmetic applications.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Sodium Stearyl Fumarate demonstrates excellent stability across a broad pH range from 3.0 to 10.0, making it suitable for diverse formulations. It maintains stability for up to 3 years at ambient temperature when stored correctly.

Conflicts

  • chlorhexidine acetate
  • secondary amines (especially under humid and basic conditions, leading to degradation products via Michael addition reaction)

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Sodium Stearyl Fumarate is safe in current cosmetic use and concentrations. It is also FDA-approved as 'Generally Recognized As Safe' (GRAS) for direct food additive purposes. While the raw material itself may cause irritation upon direct, undiluted contact, it is consistently deemed 'Irritant Free' in formulated products by SkinSAFE, indicating a very low risk in typical skincare applications.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sodium Stearyl Fumarate is a valuable excipient that significantly enhances formulation stability and texture across a wide pH range, offering excellent skin compatibility with low irritancy and comedogenicity.

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