Item  | Specification  | 
Test Item  | Standard: USP  | 
Identification  | IR spectrum similar to that of RS  | 
HPLC retention time similar to that of RS  | |
Related substance  | Total impurities: NMT0.3%  | 
Single impurity: NMT0.1%  | |
Heavy metals  | NMT 10ppm  | 
Loss on drying  | NMT0.5%  | 
Residue on ignition  | NMT0.1%  | 
Assay  | 98.5%-101.0%  | 
Item  | Specification  | 
Test Item  | Standard: USP  | 
Identification  | IR spectrum similar to that of RS  | 
HPLC retention time similar to that of RS  | |
Related substance  | Total impurities: NMT0.3%  | 
Single impurity: NMT0.1%  | |
Heavy metals  | NMT 10ppm  | 
Loss on drying  | NMT0.5%  | 
Residue on ignition  | NMT0.1%  | 
Assay  | 98.5%-101.0%  | 
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