Phenylbenzimidazole_sulfonic_acid

Ensulizole

Ensulizole

Chemical compound

Ensulizole (INN;[1] also known as phenylbenzimidazole sulfonic acid) 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. Ensulizole 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.[2] For better UVA protection, it must be paired with avobenzone, titanium dioxide, or zinc oxide; outside of the United States it can also be paired with a UV absorber of the Tinosorb or Mexoryl types. Because ensulizole is water-soluble, it has the characteristic of feeling lighter on skin. As such, it is often used in sunscreen lotions or moisturizers whose aesthetic goal is a non-greasy finish.[3] The free acid is poorly soluble in water, so it is only used as its soluble salts.[4]

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References

  1. [1]
    "International non-proprietary name". Medinet. Retrieved 6 May 2016.
  2. [2]
    "Archived copy" (PDF). www.uspdqi.org. Archived from the original (PDF) on 14 December 2003. Retrieved 22 May 2022.{{cite web}}: CS1 maint: archived copy as title (link)
  3. [3]
    eMedicine - Sunscreens and Photoprotection : Article by Stanley B Levy
  4. [4]
    "Vibrant Science & Technology - EMD Group".
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