Ensulizole
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| Names | |
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| IUPAC name
2-Phenyl-3H-benzimidazole-5-sulfonic acid
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.044.078 |
| KEGG | |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| C13H10N2O3S | |
| Molar mass | 274.29 g·mol−1 |
| Hazards | |
| Safety data sheet (SDS) | Cole Parmer Material Safety Data Sheet |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]
References
[edit]- ^ "International non-proprietary name". Medinet. Retrieved 6 May 2016.
- ^ "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) - ^ eMedicine - Sunscreens and Photoprotection : Article by Stanley B Levy
- ^ "Vibrant Science & Technology - EMD Group".