arsenic disulfide realgar二硫化砷
From it we can investigate pharmacodynamic action and mechanism of action of the antidotarium. In (2000), realgar essential component is arsenic disulfide,and contain a little arsenic trioxide and some microelement.
2000版《中国药典》雄黄主要成分为二硫化二砷(As2S2),并含有少量的三氧化二砷(As2O3)及一些微量元素,砷含量在90%以上。