GB/T 631-2007 in English

《GB/T 631-2007化学试剂 氨水》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。
本标准规定了化学试剂―氨水的性状、规格、试验、检验规则和包装及标志。 本标准适用于化学试剂―氨水的检验。

GB/T 631-2007 Chemical reagent - Ammonia solution

Warning: Attention is drawn to the necessity for taking precautions to safeguard the health and safety of the personnel conducting the tests against the potential hazard may arise from the test specified in this standard.

Molecular formula: NH3

Relative molecular mass: 17.03 (as per the international relative atomic mass in 2003)

1 Scope

This standard specifies the properties, specifications, tests, inspection rules, packaging and marking of chemical reagent - ammonia solution.

This standard is applicable to the inspection of chemical reagent - ammonia solution.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding corrigendum), 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 standards. For undated references, the latest edition of the referenced document 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 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-1992, neq ISO 3696: 1987)
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 9728 Chemical reagent - General method for the determination of sulphate (GB/T 9728-2007, ISO 6353-1: 1982, NEQ)
GB/T 9729 Chemical reagent - General method for the determination of chloride (GB/T 9729-2007, ISO 6353-1: 1982, NEQ)
GB/T 9740 Chemical reagent - General method for the determination of dry residue after evaporation (GB/T 9740-1988, eqv ISO 6353-1: 1982)
GB 15258 General rules for preparation of precautionary label for chemicals
GB 15346 Chemical reagent - Packaging and marking
HG/T 3921 Chemical reagent - Regulations for sampling and acceptance

3 Properties

This reagent is an aqueous solution of ammonia, which is colorless, transparent and pungent. It absorbs carbon dioxide in the air and has a density of about 0.90 g/mL.

4 Specifications

See Table 1 for the specifications of ammonia solution.

Table 1 Specifications of ammonia solution

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