3-Amino-1,2,4-triazole is a heterocyclic organic compound that consists of a 1,2,4-triazole substituted with an amino group. 3-AT is a competitive inhibitor of the product of the HIS3 gene, imidazoleglycerol-phosphate dehydratase.
3-Amino-1,2,4-triazole is a herbicide effective against weeds especially bermuda and quack grass. It enters plant circulation through roots and is majorly present in the meristem. 3-Amino-1,2,4-triazole inhibits chlorophyll synthesis resulting in chlorotic leaves and albino plants.