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The two isomers are:
Benzotriazole is used in chemical photography as a restrainer and fog-suppressant.
Importance in agriculture
Importance in chemical synthesis
The azide alkyne Huisgen cycloaddition is a mild and selective reaction that gives 1,2,3-triazoles as products. The reaction has been widely used in bioorthogonal chemistry and in organic synthesis. Triazoles are relatively stable functional groups and triazole linkages can be used in a variety of applications (for example, replacing the phosphate backbone of DNA.)
- Imidazole, an analog with two nonadjacent nitrogen atoms
- Pyrazole, an analog with two adjacent nitrogen atoms
- Tetrazole, an analog with four nitrogen atoms
- Gisi U, Sierotzki H,Cook A, McCaffery A (2002): Mechanisms influencing the evolution of resistance to Qo inhibitor fungicides. Pest Management Science 58: 859–867. 
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- Hiroyuki Isobe et al. (2008) Triazole-Linked Analogue of Deoxyribonucleic Acid (TLDNA): Design, Synthesis, and Double-Strand Formation with Natural DNA, Org. Lett. 10 (17), pp 3729–3732.