Sodium Isostearate

INCI: SODIUM ISOSTEARATE

CAS Number
2191-98-8
Function
Surfactant (cleansing agent); emulsifying agent; skin conditioning agent
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted; reported in cosmetic formulations. CIR reviewed fatty acid soaps and concluded safe as used

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

May be mildly irritating at high concentrations (typical for soap-type surfactants); formulate to be non-irritating. Ensure alkalinity is controlled

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Concern Level: Moderate

Frequently Asked Questions

Is Sodium Isostearate safe in cosmetics?

May be mildly irritating at high concentrations (typical for soap-type surfactants); formulate to be non-irritating. Ensure alkalinity is controlled The EU classifies Sodium Isostearate as "permitted". Safety rating: GOOD.

Is Sodium Isostearate allowed in the EU?

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

What does Sodium Isostearate do in cosmetics?

Sodium Isostearate functions as: Surfactant (cleansing agent); emulsifying agent; skin conditioning agent. It is classified as a cosmetic ingredient in our database. CAS number: 2191-98-8.

What is the Margin of Safety for Sodium Isostearate?

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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