This triazole analog, also known as 3-hydroxy-1,2,4-triazolo[4,3-a]pyridine, presents as a white to greyish yellow crystalline powder. Store in a cool and dark place at ambient temperatures for best results . 1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one is incompatible with oxidizing agents and should not be stored or handled in their vicinity.