Steareth-40

INCI: STEARETH-40

CAS Number
9005-00-9 (generic series)
Function
Surfactant – cleansing agent; gel forming agent; solubilizing agent
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes CIR-reviewed as part of alkyl PEG ether group — safe when formulated to be non-irritating

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

1,4-Dioxane contamination risk; higher EO count may carry more residual dioxane

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Concern Level: Low

Frequently Asked Questions

Is Steareth-40 safe in cosmetics?

1,4-Dioxane contamination risk; higher EO count may carry more residual dioxane The EU classifies Steareth-40 as "permitted". Safety rating: GOOD.

Is Steareth-40 allowed in the EU?

Steareth-40 EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Steareth-40 do in cosmetics?

Steareth-40 functions as: Surfactant – cleansing agent; gel forming agent; solubilizing agent. It is classified as a cosmetic ingredient in our database. CAS number: 9005-00-9 (generic series).

What is the Margin of Safety for Steareth-40?

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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