colorless crystals, the odor of charred bones. 153 ° C melting point, boiling point, 332.7 ° C (101kPa decomposition), the relative density of 1.360 (25 / 4 ° C), flash point (open cup) 209.85 ° C, light (open cup) 231.85 ° C, melt viscosity & 4.54mPa middot; s (160 ° C), a flash point of 196 ° C. Micro-soluble in water (15 ° C, 1.44g/100ml), soluble in alcohol, ether, etc. Most organic solvents. The 100ml boiling water soluble reductant sodium. 3% solution of pH 2.7.