3-Methoxy-4-methyl-1H-1,2,4-triazol-5(4H)-one Hydrate, is a Triazole (T767410) derivative that was used in microwave synthesis of 1,2,4-triazolone derivatives possessing antifungal activity. 3-Methoxy-4-methyl-1H-1,2,4-triazol-5(4H)-one is also a key intermediate for sulfonylurea herbicides, such as flucarbazone.