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砷俗称吡,其化合物是目前工农业生产中广泛应用的毒物。随着对砷毒性研究的进展,人们越来越发现它对接触工人的健康危害的严重性,故对砷接触工人的健康监护很有必要。一、砷的理化性状砷与磷同族,其化学性质很多方面与磷相似。砷有灰、黄和黑色三种同素异形体。其灰色晶体具有金属性,质脆且硬。分子量74.92。比重5.73(14°c)。熔点814°c。615c。升华。不溶于水,溶于硝酸和王水。自然界
Arsenic, commonly known as pyridine, is a compound that is currently widely used in industrial and agricultural production. With the progress of research on arsenic toxicity, people are more and more aware of the seriousness of its harm to the health of workers. Therefore, it is necessary to monitor the health of arsenic exposed workers. First, the physical and chemical properties of arsenic Arsenic and phosphorus congener, its chemical properties are similar to phosphorus in many aspects. Arsenic ash, yellow and black three allotropes. Its gray crystals are metallic, brittle and hard. Molecular weight of 74.92. The proportion of 5.73 (14 ° c). Melting point 814 ° c. 615c. sublimation. Do not dissolve in water, soluble in nitric acid and aqua regia. nature