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| Names | |
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| Preferred IUPAC name
2-(2H-Benzotriazol-2-yl)-4-methyl-6-[2-methyl-3-[1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]-1-disiloxanyl]propyl]phenol | |
| Systematic IUPAC name
2-(2H-1,2,3-Benzotriazol-2-yl)-4-methyl-6-[2-methyl-3-(2,2,4,6,6-pentamethyl-3,5-dioxa-2,4,6-trisilaheptan-4-yl)propyl]phenol | |
| Other names
2-(1,2,3-Benzotriazol-2-yl)-4-methyl-6-[2-methyl-3-(2,2,4,6,6-pentamethyl-3,5-dioxa-2,4,6-trisilaheptan-4-yl)propyl]phenol | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider |
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| ECHA InfoCard | 100.121.988 
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C24H39N3O3Si3 | |
| Molar mass | 501.849 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Drometrizole trisiloxane (INCI) is a lipophilic benzotriazole derivative marketed as Mexoryl XLbyL'Oréal and is used in sunscreens to absorb UV radiation. It is a broad-spectrum UV absorber with two absorption peaks, one at 303 nm (UVB) and one at 344 nm (UVA). Just like Mexoryl SX (ecamsule), it is used exclusively in products by L'Oréal owned brands. Drometrizole trisiloxane and ecamsule are often used together, because they show a synergistic effect in protection.[1]
Sunscreens with drometrizole trisiloxane are approved within the EU,[2] Canada,[3] Australia,[4] Japan,[5] and other countries, but not in the United States.
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Sunscreening agents approved by the US FDA or other agencies
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| UVA filters |
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| UVB filters |
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| UVA+UVB filters |
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