What is it?
Phenylbenzimidazole sulfonic acid is a UV light absorbing agent used in sunscreen and other personal care products.

How can I avoid it?
Skin contact with phenylbenzimidazole sulfonic acid is required for it to cause a rash. Discontinuation of exposure to products containing phenylbenzimidazole sulfonic acid should result in improvement and/or resolution of your dermatitis. By law, all products made in the U.S. for topical use have the ingredients listed either on the product package or the box that contains it. Check the labeling of your skin care products for this ingredient. If there is not enough information, ask your pharmacist or retailer or contact
the company directly. At work, request a Safety Data Sheet (SDS) to help identify potential sources of exposure.

  • UVB absorbing agent
  • Creams and lotions
  • Sunscreens
Other names for phenylbenzimidazole sulfonic acid:
  • Phenylbenzimidasol-5-sulfonic acid
  • Eusolex 232
  • Novantisol
  • 1H-Benzimidazole-5-sulfonic acid
  • 2-Phenylbenzimidazol-5-Sulfonic acid monohydrate
  • Parsol-HS
  • Absorber-T
  • Ensulizole

How safe is it?

Hang tight. We're thinking.