UV; IR

practically insoluble in water, sparingly soluble in tetrahydrofuran, slightly soluble in acetone and in ethanol (96percent), very slightly soluble in cyclohexane.  

≤0.5%  

≤0.1%

Impurity A,B≤0.3%; 

Total impurities≤1.0%; 

Palladium≤10ppm

98.0%~102.0%

It is suitable for the treatment of psoriasis (severe intractable cases, including erythroderma and generalized pustular type), severe intractable oral lichen planus, severe intractable keratosis (such as Ichthyoid dermatosis, congenital Ichthyoid erythroderma, lamellar ichthyosis and other ichthyosis), follicular keratosis, palmoplantar keratosis, pityriasis rubra and palmoplantar pyoma.

In an airtight container, protected from light, at a temperature of 2°C to 8°C.