items

standard

result

appearance

colorless transparent crystal

conforms

assay

99.8% min

99.9%

appearance of solution

complies with the standard

conforms

water insoluble

0.003% max

0.002%

phosphate

0.001% max

0.0003%

chloride

0.001%max

0.0005%

sulfur compounds

0.01% max

0.008%

total nitrogen

0.002% max

0.0016%

sodium

0.02% max

0.005%

iron

0.0005%max

0.0003%

heavy metal

0.0005% max

0.0002%

easy carbon compounds

comply with the standard

conforms