性质本品为白色结晶形粉末,极难溶於水,溶於酒精,乙醚氯仿,脂肪油类,及稀碱溶液。熔点为168—171°鉴别溶本品0.01克於1毫升浓硫酸,溶液应呈深橙色。当用水10毫升稀释时,溶液變略微混浊并带淡橙色,经数分钟后,颜色退去。溶本品0.05克於1毫升酒精中,并加(?)%氯化高铁5滴生成绿色,渐渐变为黄色。 Nature This product is a white crystalline powder, extremely difficult to dissolve in water, soluble in alcohol, ether chloroform, fatty oils, and dilute alkali solution. The melting point of 168-171 ° identification solution of 0.01 grams of concentrated sulfuric acid in 1 ml, the solution should be dark orange. When diluted with 10 ml of water, the solution turned slightly turbid and pale orange, and after a few minutes the color receded. Dissolve 0.05g in 1ml of alcohol and add 5 drops of (?)% ferric chloride to produce green and gradually yellow.