Steareth-1

INCI: STEARETH-1

CAS Number
9005-00-9
Function
Surfactant (cleansing), surfactant (emulsifying)
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Not restricted; CIR reviewed steareth family โ€” safe as used

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
moderate
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Ethylene oxide / 1,4-dioxane residual concern (PEG ether); low HLB (~4) so primarily W/O emulsifier; ensure ethoxylation residuals meet specifications

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Concern Level: Low

Regulatory Flags

eu_children_restricted epa_safer_alternative

Frequently Asked Questions

Is Steareth-1 safe in cosmetics?

Ethylene oxide / 1,4-dioxane residual concern (PEG ether); low HLB (~4) so primarily W/O emulsifier; ensure ethoxylation residuals meet specifications The EU classifies Steareth-1 as "permitted". Safety rating: GOOD.

Is Steareth-1 allowed in the EU?

Steareth-1 EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Steareth-1 do in cosmetics?

Steareth-1 functions as: Surfactant (cleansing), surfactant (emulsifying). It is classified as a cosmetic ingredient in our database. CAS number: 9005-00-9.

What is the Margin of Safety for Steareth-1?

not established 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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