My watch list

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.

Additional recommended knowledge

What is the Sensitivity of my Balance?

What is the Correct Way to Check Repeatability in Balances?

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