日本国产在线,99精品久久久久中文字幕,全部免费毛片免费播放,十八影院,99久久99这里只有免费的精品,日韩在线播放中文字幕,欧美一区二区三区美人

3-Cyanopyridine, precipitated from the petroleum ether or ether, is needle crystal. It can sublimate, also can be soluble in alcohol, ether, chloroform, benzene and petroleum ether, slightly soluble in water. Density: 1.159 g/ ml, melting point: 50﹣51 ℃, boiling point: 48 ℃, flash point: 84 ℃.

It is used for intermediates as medicine, food additives, feed additives, insecticide etc..