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STEARETH-30.

Valuable CAS 9005-00-9 (Generic) / CLEANSING, GEL FORMING, SURFACTANT - CLEANSING

Steareth-30 is a non-ionic polyethylene glycol ether of stearyl alcohol, functioning primarily as a surfactant and emulsifier. It is adept at reducing surface tension, which allows for the effective dispersion of oil and water, making it a versatile ingredient in various cosmetic formulations.

Summary

Surfactant Emulsifier Cleansing Agent Solubilizing Agent Gel-forming Agent

Science

Mechanism of Action

As a non-ionic surfactant, Steareth-30 lowers the interfacial tension between immiscible phases, such as oil and water, thus enabling the formation and stabilization of emulsions. In skincare applications, this mechanism facilitates gentle cleansing by solubilizing and lifting impurities from the skin's surface. It also acts as a solubilizing agent, helping to integrate oil-loving ingredients into water-based systems, and can contribute to product texture as a gel-forming agent.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Steareth-30 is a formulation aid (emulsifier, surfactant) rather than an active ingredient requiring precise concentration for a direct skin benefit. Therefore, 'dusting' analysis is not applicable.

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Steareth-30 is a waxy compound that effectively functions as a non-ionic emulsifier, creating stable oil-in-water emulsions. It is generally compatible with a wide array of oils and active ingredients, and no specific optimal pH range for its stability has been identified.

Synergies

  • Compatible with various oils and active ingredients for emulsion stability.

Conflicts

  • Can irritate skin if not formulated at appropriate concentrations to be nonirritating.
  • Should not be used on damaged skin, as this may exacerbate irritation.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Steareth ingredients, including Steareth-30, are safe for use when formulated to be nonirritating. Proper formulation is critical, as these compounds can cause irritation if not prepared correctly. Trace amounts of 1,4-dioxane, a potential by-product of the ethoxylation process, can be controlled through purification steps in manufacturing. It is explicitly advised not to use Steareth-30 on compromised or damaged skin. This ingredient is compliant with the general provisions of the Cosmetics Regulation in the European Union.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Steareth-30 is a valuable non-ionic surfactant and emulsifier, crucial for creating stable and aesthetically pleasing cosmetic formulations, while also offering gentle cleansing properties when appropriately formulated.

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