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分子式：HClO4
分子量：100.46
性质：是无色吸湿的发烟液体，极不稳定，会自发爆炸分解，故市售的只是60-70%，水溶液。比重1.768(22/4°C)。熔点-112°C。沸点16°C(18毫米)。是一种腐蚀性强酸和强氧化剂。与可燃物，如炭、纸、木屑等接触会引起爆燃。高氯酸与铁、铜、锌等剧烈反应生成氧化物，与P2O5反应生成Cl2O7。还能将元素磷和硫分别氧化成磷酸和硫酸。受热分解成二氧化氯，水和氧，且发生爆炸。腐蚀皮肤和粘膜。
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