Sodium Lauryl Phosphate

INCI: SODIUM LAURYL PHOSPHATE

CAS Number
3937-59-5 (mono-ester sodium salt, most commonly referenced)
Function
Surfactant–cleansing, surfactant–emulsifying
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
🇺🇸 US Status permitted
US Notes No standalone CIR review; not prohibited; phosphate esters generally considered safe in cosmetics

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

Phosphate ester hydrolysis can release free fatty alcohol and phosphoric acid at extreme pH; ensure stable pH in formulation. May contain mono-, di-, and tri-ester mixtures depending on supplier — verify composition for consistency

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Concern Level: Low

Frequently Asked Questions

Is Sodium Lauryl Phosphate safe in cosmetics?

Phosphate ester hydrolysis can release free fatty alcohol and phosphoric acid at extreme pH; ensure stable pH in formulation. May contain mono-, di-, and tri-ester mixtures depending on supplier — verify composition for consistency The EU classifies Sodium Lauryl Phosphate as "permitted". Safety rating: GOOD.

Is Sodium Lauryl Phosphate allowed in the EU?

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

What does Sodium Lauryl Phosphate do in cosmetics?

Sodium Lauryl Phosphate functions as: Surfactant–cleansing, surfactant–emulsifying. It is classified as a cosmetic ingredient in our database. CAS number: 3937-59-5 (mono-ester sodium salt, most commonly referenced).

What is the Margin of Safety for Sodium Lauryl Phosphate?

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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