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Physical propertyLayered hybrid mixture and steam (2.51... Molecular physicochemical properties: colorless, pale ammonia liquid. C3-H7-N-O. amount 73.10. relative density of 0.9445 (25 DEG C). Melting point - 61 DEG C boiling point 152.8 DEG C flash point of 57.78 degrees. Vapor density vapor pressure 0.49kpa 3.7mmHg25 DEG C, the. Autoignition point 445 degrees centigrade. The refractive index 1.42817 solubility Delta =12.1. air explosion limit of 2.2 ~ 15.2%. With water and general organic solvent miscible with petroleum ether. In case of fire, high fever can cause combustion and explosion. W