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Benzotriazole

Benzotriazole

Other names	1H-Benzotriazol, 1,2,3-Benzotriazol
Identifiers
CAS number	95-14-7
PubChem	7220
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 (pK_a)	8,37 ^[2]
Hazards
Main hazards	XN ^[1]
R-phrases	R20/22 R36 R52/53 ^[1]
S-phrases	–
R/S statement	–
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Benzotriazole is a chemical substance that is used as a ligand to form complexes.

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Production

Benzotriazole is produced by reaction of o-phenylenediamine, sodium nitrite and acetic acid.^[3]

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.

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]

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