Sodium Polynaphthalenesulfonate

INCI: SODIUM POLYNAPHTHALENESULFONATE

CAS Number
9084-06-4
Function
Emulsion Stabilizing, Gel Forming, Surfactant – Cleansing, Surfactant – Hydrotrope
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes CIR reviewed — safe for skin-applied products only; insufficient data for mucous membrane/ingestion

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

CIR: safe for SKIN application only — insufficient data for mucous membrane or ingestion. Formaldehyde-condensed polymer: free formaldehyde must be <0.05%. Declining use (50→12 formulations between 1998–2019) .

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Concern Level: Moderate

Frequently Asked Questions

Is Sodium Polynaphthalenesulfonate safe in cosmetics?

CIR: safe for SKIN application only — insufficient data for mucous membrane or ingestion. Formaldehyde-condensed polymer: free formaldehyde must be <0.05%. Declining use (50→12 formulations between 1998–2019) . The EU classifies Sodium Polynaphthalenesulfonate as "permitted". Safety rating: MODERATE.

Is Sodium Polynaphthalenesulfonate allowed in the EU?

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

What does Sodium Polynaphthalenesulfonate do in cosmetics?

Sodium Polynaphthalenesulfonate functions as: Emulsion Stabilizing, Gel Forming, Surfactant – Cleansing, Surfactant – Hydrotrope. It is classified as a cosmetic ingredient in our database. CAS number: 9084-06-4.

What is the Margin of Safety for Sodium Polynaphthalenesulfonate?

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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