Items

Specification

Appearance:

Pale-yellow amorphous powder.

Identification:

Should match with standard

Specific rotation:

-240 to -250

Solubility:

Soluble in water, freely soluble in alcohol and chloroform, slightly soluble in ether.

Loss on drying:

Not more than 2%

Limit of colchicines:

Not definite green color is produced

Limit of ethyl acetate:

Not more than 8%

Chromatographic purity:

Not more than 5%

Organic volatile impurities:

Meet the requirements, except chloroform not more than 100ppm

Assay:

Not less than 99.5%