Sodium Octoxynol-2 Ethane Sulfonate

INCI: SODIUM OCTOXYNOL-2 ETHANE SULFONATE

CAS Number
55837-16-6 (also 2917-94-4, 67923-87-9)
Function
Surfactant – Cleansing; Surfactant – Emulsifying
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes CIR: Safe as used in rinse-off products; safe at ≤5% in leave-on products (IJT 2004)

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Ethoxylated ingredient – verify 1,4-dioxane and ethylene oxide residuals meet limits (<10 ppm 1,4-dioxane recommended); declining use in cosmetics

⚠️
Concern Level: Low

Frequently Asked Questions

Is Sodium Octoxynol-2 Ethane Sulfonate safe in cosmetics?

Ethoxylated ingredient – verify 1,4-dioxane and ethylene oxide residuals meet limits (<10 ppm 1,4-dioxane recommended); declining use in cosmetics The EU classifies Sodium Octoxynol-2 Ethane Sulfonate as "permitted". Safety rating: GOOD.

Is Sodium Octoxynol-2 Ethane Sulfonate allowed in the EU?

Sodium Octoxynol-2 Ethane Sulfonate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Sodium Octoxynol-2 Ethane Sulfonate do in cosmetics?

Sodium Octoxynol-2 Ethane Sulfonate functions as: Surfactant – Cleansing; Surfactant – Emulsifying. It is classified as a cosmetic ingredient in our database. CAS number: 55837-16-6 (also 2917-94-4, 67923-87-9).

What is the Margin of Safety for Sodium Octoxynol-2 Ethane Sulfonate?

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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