Standard No.:	GB 25579-2010
English Name:	Food Additive - Zinc Sulfate
Chinese Name:	食品添加剂 硫酸锌
Chinese Classification:	X09    Hygiene, safety and labor protection
Professional Classification:	GB    National Standard
Issued by:	MOH
Issued on:	2010-12-21
Implemented on:	2011-2-21
Status:	valid
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	184.00
Delivery:	via email in 1 business day

1 Scope



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.

Foreword i
1 Scope
2 Normative References
3 Molecular Formula and Relative Molecular Mass
4 Technical Requirements
Annex A (Normative) Inspection Methods
Annex B (Informative) Treatment of Waste Mercury Liquid