Tags: Chemical Compound, Chemical Substance.

Phenylbenzimidazole sulfonic acid (C13H10N2O3S) is a common sunscreen agent. In 1999 the United States Food and Drug Administration regulated that the name ensulizole be used on sunscreen labels in the United States. Phenylbenzimidazole sulfonic acid is primarily a UVB protecting agent providing only minimal UVA protection. The scope of UVB is 290 to 340 nanometers whereas the UVA range is 320 to 400 nanometers.

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IUPAC name
2-Phenyl-3H-benzimidazole-5-sulfonic acid

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