Phenylbenzimidazole sulfonic acid
Structural formula | ||||||||||||||||||||||
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General | ||||||||||||||||||||||
Surname | Phenylbenzimidazole sulfonic acid | |||||||||||||||||||||
other names | ||||||||||||||||||||||
Molecular formula | C 13 H 10 N 2 O 3 S | |||||||||||||||||||||
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properties | ||||||||||||||||||||||
Molar mass | 274.29 g mol −1 | |||||||||||||||||||||
Physical state |
firmly |
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Melting point |
> 300 ° C |
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solubility |
sparingly soluble in water: 2.5 g · l −1 |
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safety instructions | ||||||||||||||||||||||
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Toxicological data |
> 6,600 mg kg −1 ( LD 50 , rat , oral , sodium salt ) |
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Phenylbenzimidazolesulfonic ( international name Ensulizol ) is a UV filter , which is on the market since the 1934th Because of its low solubility, it must be neutralized with a strong base such as sodium hydroxide or potassium hydroxide . The Sunscreen Index as a triethanolamine salt is 8.2.
Admission
According to the German Cosmetics Ordinance, phenylbenzimidazole sulfonic acid is permitted up to a maximum concentration of 8% (calculated as acid).
Individual evidence
- ↑ Entry on PHENYLBENZIMIDAZOLE SULFONIC ACID in the CosIng database of the EU Commission, accessed on July 6, 2020.
- ↑ a b c data sheet 2-Phenylbenzimidazole-5-sulfonic acid monohydrate, 98% from AlfaAesar, accessed on May 26, 2014 ( PDF )(JavaScript required) .
- ↑ a b Patent WO2007135196 : Stable soluble salts of phenylbenzimidazole sulfonic acid at phs at or below 7.0. Registered on July 9, 2007 , published on November 29, 2007 , applicant: Symrise, inventor: William Johncock, Juergen Claus.
- ↑ a b c Entry on 2-phenylbenzimidazole-5-sulfonic acid. In: Römpp Online . Georg Thieme Verlag, accessed on May 26, 2014.