Tolyltriazole

Tolyltriazole is a mixture of isomers or congeners that differ from benzotriazole by the addition of one methyl group attached somewhere on the benzene ring. "The term tolyltriazole (CAS 29385-43-1) generally [refers to] the commercial mixture composed of approximately equal amounts of 4- and 5-methylbenzotriazole, with small quantities of [their respective 7- and 6-methyl tautomers]".[1]

Tolyltriazole
Skeletal formula of tolyltriazole
5-Methyl-1H-benzotriazole, one of the isomers in tolyltriazole
Names
Other names
_-Methyl-1H-benzotriazole (4, 5, 6, 7, mixture)
Identifiers
ECHA InfoCard 100.045.073
Properties
C7H7N3
Molar mass 133.154 g·mol−1
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
Related compounds
Related compounds
 Benzotriazole
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Synthesis and reactions

Synthesis is much like that of benzotriazole, but starting with methyl-o-phenylenediamine instead of o-phenylenediamine. Isomers of methyl-o-phenylenediamine include 3-methyl-o-phenylenediamine, 4-methyl-o-phenylenediamine, and N-methyl-o-phenylenediamine (not involved here).

Applications

Tolyltriazole has uses similar to benzotriazole, but has better solubility in some organic solvents.

References
Wikimedia Commons has media related to Benzotriazoles.
  1. Benzotriazole and Tolyltriazole: Evaluation of health hazards and proposal of health-based quality criteria for soil and drinking water, Environmental Project No. 1526, 2006, 2013, The Danish Environmental Protection Agency, ISBN 9 7 8-87-93026-81-0


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