(1) Into about 0.1g sample, add 10ml of water for dissolving, if add little quantity of erythrosine and well shaking, then the test solution turns to pink; if add 5ml of methylene dichloride and well shaking, then the layer of methylene dichloride turns to pink. (2) Into about 0.1g sample, add 10ml of water for dissolving, add 0.5ml of mixture solution of 0.6 potassium ferricyanide and 0.9% ferric chloride, heating and the test solution turns to blue. (3) It gives reaction of chloride. (4) The IR absorption spectrum of the substance to be examined corresponds to that of the reference standard.
(1) Conform (2) Conform (3) Conform (4) Conform
Clarity and color of solution
The test solution should be clear and colorless; and the absorbance shouldn’t be more than 0.05 if appearing with color
The test solution be clear and colorless
Any biggest individual impurity (exceptAcetaminophen)