Testing items

Characters

White or off-white powder

 

Identification

The retention time for the main peaks of sample should be the same as the retention time for reference standard

Max. Absorption at 240nm

Should show positive reaction of propionate

PH

5.5-7.5

Water

≤5.0%

Turbidity of solution

clear or not more than opalescent than reference suspension Ⅰ

Color of solution

not more than reference solution Y4 or YG4

Related Substances

≤2.0%

Residue on Ignition

≤0.2%

Heavy Metals

≤20PPM

Assay

≥98.0% calculated on anhydrous basis