Sodium Stearoyl Methyl Isethionate

INCI: SODIUM STEAROYL METHYL ISETHIONATE

CAS Number
Not individually assigned in public databases
Function
Surfactant — cleansing
Safety Rating
EXCELLENT

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes CIR assessed isethionate salts as a class — safe at ≤50% in rinse-off and ≤17% in leave-on products

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

May be produced via ethoxylation — check for 1,4-dioxane residues; prohibited under COSMOS specifications if ethoxylated

⚠️
Concern Level: None

Frequently Asked Questions

Is Sodium Stearoyl Methyl Isethionate safe in cosmetics?

May be produced via ethoxylation — check for 1,4-dioxane residues; prohibited under COSMOS specifications if ethoxylated The EU classifies Sodium Stearoyl Methyl Isethionate as "permitted". Safety rating: EXCELLENT.

Is Sodium Stearoyl Methyl Isethionate allowed in the EU?

Sodium Stearoyl Methyl Isethionate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Sodium Stearoyl Methyl Isethionate do in cosmetics?

Sodium Stearoyl Methyl Isethionate functions as: Surfactant — cleansing. It is classified as a cosmetic ingredient in our database. CAS number: Not individually assigned in public databases.

What is the Margin of Safety for Sodium Stearoyl Methyl Isethionate?

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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