Phenylbenzimidazole Sulfonic Acid

Synonyms: Ensulizole

CAS Number: 27503-81-7

SERIOUS
health hazard

MODERATE
health hazard

FEW OR NO
health hazards

0 79
80 89
90 100
96

Sources of exposure:

Personal care

Sunscreens, facial moisturizers with SPF, UV-protective cosmetics, and water-based sunscreen formulations

Description:

Phenylbenzimidazole sulfonic acid, also known as ensulizole, is a synthetic, water-soluble UV filter used in sunscreen and cosmetic products. It primarily absorbs UVB radiation and is commonly incorporated into lightweight or water-based sunscreen formulations.

Health concerns:

Irritant

May cause skin, eye, or respiratory irritation.

Banned/restricted lists:

  • EU Cosmetics Regulation Annex VI - Permitted UV filter

References

  1. US Environmental Protection Agency. Cheminformatics Modules, Computational Toxicology and Exposure Informatics (CompTox).
  2. US National Library of Medicine. PubChem database.

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We identified key chemicals based on a database compiling dozens of authoritative sources, screening tools, and QSAR models.

Hazard scores within 11 different health categories (carcinogens, endocrine disruptors, reproductive toxicants, developmental toxicants, genotoxicity, neurotoxicity, organ system toxicity, immunotoxicity, respiratory toxicity, skin/eye/respiratory irritants, and ecotoxicity).

They are weighted based on several factors, including strength of evidence for adverse impacts in humans, severity, and potential contamination.

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