Sodium Phenylbenzimidazole Sulfonate

INCI: SODIUM PHENYLBENZIMIDAZOLE SULFONATE (ALSO KNOWN AS ENSULIZOLE SODIUM SALT)

CAS Number
36586-73-5 (sodium salt); acid form (PBSA): 27503-81-7
Function
UV filter / UV absorber — UV-B protection (280–320 nm)
Safety Rating
GOOD

Regulatory Status

🇪🇺 EU Status permitted
EU Max Conc. 8%
🇺🇸 US Status permitted
US Notes FDA-approved OTC sunscreen active (Ensulizole); permitted up to 4% in OTC sunscreens

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Can generate reactive oxygen species (ROS) under UV; potential indirect phototoxicity; best used in combination with UVA filters for broad-spectrum protection

⚠️
Concern Level: Moderate

Frequently Asked Questions

Is Sodium Phenylbenzimidazole Sulfonate safe in cosmetics?

Can generate reactive oxygen species (ROS) under UV; potential indirect phototoxicity; best used in combination with UVA filters for broad-spectrum protection The EU classifies Sodium Phenylbenzimidazole Sulfonate as "permitted". Safety rating: GOOD.

Is Sodium Phenylbenzimidazole Sulfonate allowed in the EU?

Sodium Phenylbenzimidazole Sulfonate EU regulatory status: permitted. Maximum allowed concentration: 8%. This is based on EU Regulation 1223/2009 and its amendments.

What does Sodium Phenylbenzimidazole Sulfonate do in cosmetics?

Sodium Phenylbenzimidazole Sulfonate functions as: UV filter / UV absorber — UV-B protection (280–320 nm). It is classified as a cosmetic ingredient in our database. CAS number: 36586-73-5 (sodium salt); acid form (PBSA): 27503-81-7.

What is the Margin of Safety for Sodium Phenylbenzimidazole 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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