Bemotrizinol
Chemical compound
From Wikipedia, the free encyclopedia
Bemotrizinol (INN, USAN, INCI name bis-ethylhexyloxyphenol methoxyphenyl triazine, BEMT;[1][2][3] marketed as Escalol S, Parsol Shield, and Tinosorb S) is an oil-soluble organic compound that is added to sunscreens to absorb UV rays.
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| Names | |
|---|---|
| Preferred IUPAC name
2,2′-[6-(4-Methoxyphenyl)-1,3,5-triazine-2,4-diyl]bis{5-[(2-ethylhexyl)oxy]phenol} | |
| Other names
Tinosorb S Bis-ethylhexyloxyphenol methoxyphenyl triazine Anisotriazine | |
| Identifiers | |
3D model (JSmol) |
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| Abbreviations | BEMT |
| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.109.468 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C38H49N3O5 | |
| Molar mass | 627.826 g·mol−1 |
| Hazards | |
| GHS labelling: | |
| H413 | |
| P273, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Bemotrizinol is a broad-spectrum UV absorber, absorbing both UVB and UVA rays. It has two absorption peaks, 310 and 340 nm.[4] It is highly photostable. Even after 50 MEDs (minimal erythemal doses), 98.4% remains intact. It helps prevent the photodegradation of other sunscreen actives like avobenzone.[5] Tinosorb S Aqua, recently developed by BASF, is bemotrizinol in a PMMA matrix dispersed in water. This makes it possible to add bemotrizinol to the water phase.[6]
Bemotrizinol has strong synergistic effects on the SPF when formulated with bisoctrizole, ethylhexyl triazone, or iscotrizinol.[7] It is the most effective UV absorber available measured by SPF, based on the maximum concentration permitted by European legislation.[8]
It has been approved in the European Union since 2000,[9] and some other parts of the world,[which?] including Australia.[10][11] In June 2026, bemotrizinol was approved for use in sunscreens in the United States.[12]
Unlike some other organic sunscreen actives, it shows no estrogenic effects in vitro.[13]
