Benzotriazole
From Wikipedia, the free encyclopedia
| Benzotriazole | |
|---|---|
 |
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| Other names | 1H-Benzotriazol, 1,2,3-Benzotriazol |
| Identifiers | |
| CAS number | [95-14-7] |
| PubChem | |
| Properties | |
| Molecular formula | C6H5N3 |
| Molar mass | 119,13 g/mol |
| Appearance | solid |
| Density | 1,36 g·cm−3 [1] |
| Melting point |
100 °C [2] |
| Boiling point |
350 °C [2] |
| Solubility in water | soluble in water (20 g/l) [2] |
| Acidity (pKa) | 8,37 [2] |
| Hazards | |
| Main hazards | XN [1] |
| R-phrases | R20/22 R36 R52/53 [1] |
| S-phrases | – |
| R/S statement | – |
| Related compounds | |
| Related compounds | Benzimidazole |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Benzotriazole is an aromatic azole containing two fused rings. Benzotriazoles are also a class of compounds containing the benzotriazole skeleton.
Contents |
[edit] Production
Benzotriazole is produced by reaction of o-phenylenediamine, sodium nitrite and acetic acid.[3]
[edit] Uses
Benzotriazole is a complexing agent. It is used as a corrosion inhibitor, an aircraft deicer and anti-icer fluid as well as for silver protection in dishwashing detergents. Benzotriazole skeletons are found in pharmaceuticals such as antifungal, antibacterial, and anthelmintic drugs.
[edit] Environmental relevance
Benzotriazole is fairly well water-soluble, not readily degradable and has a limited sorption tendency. Hence, it is only partly removed in wastewater treatment plants and a substantial fraction reaches surface water like rivers and lakes.[4]
[edit] References
- ^ a b c chemdat.info
- ^ a b c d SRC PhysProp Database: 1H-Benzotriazole
- ^ U.S. Patent 4299965
- ^ W. Giger, C. Schaffner, HP. Kohler (2006): Benzotriazole and Tolyltriazole as Aquatic Contaminants. 1. Input and Occurrence in Rivers and Lakes. Environ. Sci. Technol. 40,7186-7192. PMID 17180965
