This standard is applicable to the zinc sulfate (food additive) made from sulfuric acid and zinc oxide (or zinc hydroxide), or that refined from sphalerite after calcination and leaching with sulfuric acid.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
3 Molecular Formula and Relative Molecular Mass
3.1 Molecular formula
Zinc sulfate monohydrate: ZnSO4?H2O
Heptahydrate: ZnSO4?7H2O
3.2 Relative molecular mass
Zinc sulfate monohydrate: 179.49 (according to Atomic Weights of the Elements 2007)
Heptahydrate: 287.58 (according to Atomic Weights of the Elements 2007)
4 Technical Requirements
4.1 Sensory requirements: in accordance with those specified in Table 1.
