Item

Specification

Identification

(1):Dissolve 1.0mg of sample with 2ml of   sulfuric acid, add three drops of chromotropic acid solution, heating on a   water-bath at 40℃   for 10 minutes, purple colour is obtained.

(2)UV absorption Max, at 258、266、326 and 340nm

(3)IR spectra is consistent with CRS

Appearance   of solution

Clear   and colourless

Chloride

≤0.012%

Loss   on drying

≤0.2%

Residue   on ignition

≤0.1%

Heavy   metals

Less   than or equal to 20 millionths

Arsenic

Less   than or equal to 5 millionths

Assay

Content   of C₁₃H₁₁NO₅(On dried basis) ≥99.0%