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DISTEARYL THIODIPROPIONATE.

Valuable CAS 693-36-7 / ANTIOXIDANT

Distearyl Thiodipropionate is a multifaceted thioester that functions as an antioxidant and UV stabilizer, safeguarding the skin from free radical and sun-induced damage. Beyond protection, it acts as a skin conditioning agent, smoothing and softening the skin while enhancing moisture retention.

Summary

Antioxidant UV Stabilizer Skin Conditioning Emulsifier Viscosity Controlling

Science

Mechanism of Action

This ingredient operates primarily as a secondary antioxidant within lipophilic systems, effectively scavenging peroxides and thereby mitigating oxidative stress on the skin. It also serves as a UV stabilizer, contributing to the skin's defense against ultraviolet radiation. As a skin conditioning agent, it imparts softness and smoothness to the skin's surface and boasts water-resistant properties that help preserve natural moisture. Furthermore, Distearyl Thiodipropionate functions as an emulsifier to facilitate uniform ingredient dispersion and as a viscosity controlling agent to optimize product texture.

Research

Clinical Evidence

Medium confidence
Effective range 0.05–1%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Distearyl Thiodipropionate exhibits excellent thermal stability, demonstrating resistance to heat and hydrolysis, which ensures its integrity and performance under typical manufacturing and storage conditions.

Conflicts

  • Requires careful compatibility assessment with various polymers and complex formulation components to prevent potential adverse interactions, as its suitability is not universal across all systems.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
4%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded Distearyl Thiodipropionate is safe for cosmetic use provided it is formulated to be non-irritating. The noted maximum concentration of 4% refers to levels where irritation was observed with a related compound (Dilauryl Thiodipropionate), emphasizing the necessity for careful formulation at higher concentrations to avoid skin irritation. The FDA lists Distearyl Thiodipropionate as an antioxidant for food packaging materials, and its related compounds are Generally Recognized As Safe (GRAS) as food preservatives.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Distearyl Thiodipropionate is a valuable multifunctional ingredient offering significant antioxidant, UV stabilizing, and skin conditioning benefits, best utilized at concentrations of 1% or less to ensure optimal skin compatibility and minimize irritation potential.

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