Items

Specificcations

Results

Characteristic

A white,almost white or faintly yellow crystalline powder,odorless 

Almost white crystalline powder, odorless 

Specific absorbance

485~505

493

UV absorption

The light absorption exhibits a maximum at 312nm

Comply

Infrared absorption

Conforms to the reference spectrum 

Conforms

Polymorph A

Comply

Comply

Related substances

Comply

Comply

Loss on drying 

≤0.5%

0.02%

Residue on ignition

≤0.1%

0.05%

Heavy metals

≤20PPM

Comply

Assay

98.0%~102.0%C16H13N3O3       (on the dried basis)

98.9%