Zinc Sulphate Capsules
DEFINITION
Zinc Sulfate Capsules contain Zinc Sulfate Monohydrate.
The capsules comply with the requirements stated under Capsules and with the following requirements.
Content of zinc sulfate monohydrate, ZnSO4, H2O
95.0 to 105.0% of the stated amount.
IDENTIFICATION
A. A quantity of the contents of the capsules containing 0.1 g of Zinc Sulfate Monohydrate yields the reaction characteristic of zinc and zinc salts, Appendix VI.
B. A quantity of the contents of the capsules containing 45 mg of Zinc Sulfate Monohydrate yields the reactions characteristic of sulfates, Appendix VI.
ASSAY
Disperse a quantity of the mixed contents of 20 capsules containing 0.16 g of Zinc Sulfate Monohydrate in 5 mL of dilute acetic acid. Carry out the complexemetric titration of zinc, Appendix VIII D.
Each mL of 0.1M sodium edetate is equivalent to 17.95 mg of ZnSO4, H2O.
STORAGE
Zinc Sulfate Capsules should be protected from light and moisture.
