红色至桔红色结晶。略有吸湿性。100℃时失去结晶水,约400℃时开始分解。易溶于水,不溶于乙醇,水溶液呈酸性。1%水溶液的pH为4,10%水溶液的pH为3.5。相对密度2.348。熔点356.7℃(无水品)。有强氧化性,与有机物摩擦或撞击能引起燃烧。极毒(T+),半数致死量(大鼠,经口)50mg/kg(无水品)。经流行病学调查表明,对人有强致癌危险性。有腐蚀性。
The mixture with 1:2 of molar ratio of sodium dichromate to1,3-dichloro-2-propanol was stirred at 23-27 ℃ for 5 hours. Under the above conditions, pure 1,3-dichloroacetone was obtained with a yield of 79.6%.
采用重铬酸钠/浓硫酸氧化剂体系氧化1,3-二氯-2-丙醇制备1,3-二氯丙酮,重铬酸钠与1,3-二氯-2-丙醇的摩尔比为1:2,将稀释后的硫酸滴入1,3-二氯-2-丙醇与重铬酸钠水溶液的混合物中,在温度为23-27℃的条件下搅拌反应5h,产率79.6%。
参考来源 - 氟康唑的合成与有机物定量结构—性质关系研究·2,447,543篇论文数据,部分数据来源于NoteExpress
化学处理,例如重铬酸钠溶液,可以促进无氧化膜和杂质不锈钢表面的钝化膜更快速度的生成。
Chemical treatments, such as sodium dichromate solutions, may facilitate the more rapid formation of the passive film on a stainless steel surface already free of scale or foreign matter.
用开水冲洗便可得到清晰的花纹,再用5%的重铬酸钠在丝网版的涂胶面涂刷一次,即制成印剧丝网版。
Rinse with water will be clear pattern, and then 5% sodium dichromate coating surface in the screen version of the brushing time, that is made of printed silk screen drama.
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