White crystal powder, color also may be pale grey or pale yellow. Easily soluble in water, and its water solution is weakly acidic, slightly soluble in ethyl alcohol. Sublimation if heating to 340℃. Decomposed to ammonia and hydrogen chloride if heating to 400℃. Absorbing moist and caking in the moist and raining weather. It will corrode the black metal and other metal.
Used in dry cell, dyeing, tanning, electrical plating. It's also used as pharmaceuticals, welding agent and hardener in molding of precision casting.
