... in alcohol,ether,slightly soluble in water,easy to change color in the air.Specification:Content:99.0-100.5 ... %Specific gravity:1.180-1.186(20oC)Refractive index:1.535-1.538Acidity:5 ... .0g sample in 50ml alcohl, not more than 0.4ml in 0.1Mol ... medicine for dephlogistication,and analgesia,partially used in joint and muscle pain and often used ...