Items

Specification

Appearance:

White or pale-yellow powder

pH value(3% solution):

7.0-8.5

State of solution:

Colorless to pale yellowish transparent

Color and clarity of solution:

Clear and not more than BY₆

Chloride:

Not more than 0.35%

Heavy metals (Pb):

Not more than 10ppm

Arsenic:

Not more than 2ppm

Free ascorbic acid:

Not more than 0.5%

Free phosphoric acid:

Not more than 1%

Derivatives of ascorbic acid:

Not more than 3.5%

Ketogulonic acid and its

Derivatives:

Not more than 2.5%

Water:

Not more than 20%

Assay (anhydrous):

Not less than 99%

Total aerobic acid:

Not more than 100cfu/g

Escherichia coli:

Negative