Purity（%）...................................................>99.0

Meltiing Point(℃).............................................~618
Insolubles(%)................................................<0.005

Heavy Metals(as Pb)(%)...............................<0.0005

白色粉末。輕質(zhì)。有堿性。1G溶于78ml冷水和140ml沸水,溶于稀酸,幾乎不溶于乙醇。相對密度2.11。熔點(diǎn)618℃。沸點(diǎn)735℃。低毒,半數(shù)致死量(大鼠,經(jīng)口)0.71G/kG。有刺激性。