GB/T 664-2011 in English

《GB/T 664-2011化学试剂 七水合硫酸亚铁（硫酸亚铁）》由TC63（全国化学标准化技术委员会）归口，TC63SC3（全国化学标准化技术委员会化学试剂分会）执行，主管部门为中国石油和化学工业联合会。

GB/T 664-2011 Chemical reagent - Iron(II) sulfate heptahydrate

Molecular formula: FeSO4·7H2O

Relative molecular mass: 278.02 (as per the international relative atomic mass in 2007)

1 Scope

This standard specifies the properties, specifications, tests, inspection rules, packaging and marking of iron(II) sulfate heptahydrate among chemical reagents.

This standard is applicable to the inspection of iron(II) sulfate heptahydrate among chemical reagents.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.

GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 602 Chemical reagent - Preparations of standard solutions for impurity (GB/T 602-2002, ISO 6353-1:1982, NEQ)
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods (GB/T 603-2002, ISO 6353-1:1982, NEQ)
GB/T 609 Chemical reagent - General method for the determination of total nitrogen (GB/T 609-2006, ISO 6353-1:1982, NEQ)
GB/T 610-2008 Chemical reagent - General method for the determination of arsenic (ISO 6353-1:1982, NEQ)
GB/T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008, ISO 3696:1987, MOD)
GB/T 9723-2007 Chemical reagent - General rule for flame atomic absorption spectrometric analysis
GB/T 9727 Chemical reagent - General method for the determination of phosphate (GB/T 9727-2007, ISO 6353-1:1982, NEQ)
GB/T 9738 Chemical reagent - General method for the determination of water insoluble matter (GB/T 9738-2008, ISO 6353-1:1982, NEQ)
GB 15346 Chemical reagent - Packaging and marking
HG/T 3921 Chemical reagent - Regulations for sampling and acceptance

3 Properties

The reagent is light blue-green crystal, weathered and oxidized in air, soluble in water and insoluble in ethanol.

4 Specifications

See Table 1 for the specifications of iron(II) sulfate heptahydrate.

Foreword i
1 Scope
2 Normative references
3 Properties
4 Specifications
5 Tests
6 Inspection rules
7 Packaging and marking