Standard No.:	GB/T 664-2011
English Name:	Chemical reagent—Iron(Ⅱ)sulfate heptahydrate
Chinese Name:	化学试剂　七水合硫酸亚铁（硫酸亚铁）
Chinese Classification:	G62    General inorganic reagent
Professional Classification:	GB    National Standard
ICS Classification:	71.040.30 71.040.30    Chemical reagents 71.040.30
Source Content Issued by:	AQSIQ;SAC
Issued on:	2011-5-12
Implemented on:	2011-12-1
Status:	valid
Superseding:	GB/T 664-1993 Chemical reagents;Ferrous sulfate
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	120.0
Delivery:	via email in 1 business day

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