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1,2,4-Triazole is an organic solid, with a melting point of 120°C and a boiling point of 260°C at 1013 hPa. The vapour pressure values for 1,2,4-triazole were reported as 2.15E-4 kPa at 20 °C and 2.03E-2 Torr at 25°C (298 K), for measured and calculated values, respectively. 1,2,4-Triazole is very soluble in water, and has a calculated n-octanol water partition coefficient (log Kow) of -0.76. 1,2,4-Triazole is more dense than water with a reported density of 1.13 g/cm3 at 153°C. This compound is non-flammable, with an estimated value for the flash point of 139.1 ± 11.7°C. 1,2,4-Triazole does not posses oxidizing or explosive properties.