Poor Cosmetic Ingredient

Oxobenzoxazinyl Naphthalene Sulfoanilide

INCI: OXOBENZOXAZINYL NAPHTHALENE SULFOANILIDE

CAS Number
10128-55-9 [^1_20]
Function
UV absorber
Safety Rating
POOR

Regulatory Status

🇪🇺 EU Status prohibited
🇺🇸 US Status prohibited
US Notes Not on FDA's OTC sunscreen monograph — cannot be marketed as sunscreen active in the US

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
moderate
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Not authorized as UV filter in EU or US. Sulfonamide/naphthalene structure requires mutagenicity evaluation. Extremely limited safety data available.

⚠️
Concern Level: High

Frequently Asked Questions

Is Oxobenzoxazinyl Naphthalene Sulfoanilide safe in cosmetics?

Not authorized as UV filter in EU or US. Sulfonamide/naphthalene structure requires mutagenicity evaluation. Extremely limited safety data available. The EU classifies Oxobenzoxazinyl Naphthalene Sulfoanilide as "prohibited". Safety rating: POOR.

Is Oxobenzoxazinyl Naphthalene Sulfoanilide allowed in the EU?

Oxobenzoxazinyl Naphthalene Sulfoanilide EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

What does Oxobenzoxazinyl Naphthalene Sulfoanilide do in cosmetics?

Oxobenzoxazinyl Naphthalene Sulfoanilide functions as: UV absorber. It is classified as a cosmetic ingredient in our database. CAS number: 10128-55-9 [^1_20].

What is the Margin of Safety for Oxobenzoxazinyl Naphthalene Sulfoanilide?

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.

Compliance Tools

Check Oxobenzoxazinyl Naphthalene Sulfoanilide compliance across multiple jurisdictions:

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Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
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Substance Compliance
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
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Heavy Metal Limits
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