Sodium Undecylenate

INCI: SODIUM UNDECYLENATE

CAS Number
3398-33-2
Function
Preservative, Surfactant – Cleansing, Surfactant – Emulsifying (sodium salt of undecylenic acid / 10-undecenoic acid)
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes Permitted for cosmetic use; undecylenic acid and its salts are also FDA-approved OTC antifungal actives (21 CFR 333.210)

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

Must comply with Annex V concentration limits. Antifungal activity is the primary mechanism of preservation – ensure compliance with preservative claims vs. active drug classification depending on jurisdiction

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Concern Level: Low

Regulatory Flags

preservative

Frequently Asked Questions

Is Sodium Undecylenate safe in cosmetics?

Must comply with Annex V concentration limits. Antifungal activity is the primary mechanism of preservation – ensure compliance with preservative claims vs. active drug classification depending on jurisdiction The EU classifies Sodium Undecylenate as "permitted". Safety rating: GOOD.

Is Sodium Undecylenate allowed in the EU?

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

What does Sodium Undecylenate do in cosmetics?

Sodium Undecylenate functions as: Preservative, Surfactant – Cleansing, Surfactant – Emulsifying (sodium salt of undecylenic acid / 10-undecenoic acid). It is classified as a cosmetic ingredient in our database. CAS number: 3398-33-2.

What is the Margin of Safety for Sodium Undecylenate?

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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