GB/T 4553-2002 in English

《GB/T 4553-2002工业硝酸钠》由TC63（全国化学标准化技术委员会）归口，TC63SC1（全国化学标准化技术委员会无机化工分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了工业硝酸钠的要求、试验方法、检验规则以及标志、标签、包装、运输、贮存和安全。本标准适用于工业硝酸钠。该产品是重要化工原料，广泛用于玻璃、炸药、染料、冶金、机械、搪瓷等工业。

1. Scope

This standard specifies the requirements, test methods, inspection rules, markings, labels, packaging, transportation, storage and safety of sodium nitrate for industrial use.
This standard is applicable to sodium nitrate for industrial use. The product is an important chemical raw material and extensively used in industries such as glass, explosive, colorant, metallurgy, machine, enamel, etc.
Molecular formula: NaNO3
Relative molecular mass: 84.99 (based on 1999 international relative atomic mass)

2. Normative References

The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable.
GB 190-1990 Packing Symbol of Dangerous Goods
GB 191-2000 Packaging - Pictorial Marking for Handling of Goods (eqv ISO 780: 1997)
GB/T 601-1988 Chemical Reagent-Preparations of Standard Volumetric Solutions
GB/T 602-1988 Chemical Reagent–Preparations of Standard Solutions for Impurity
GB/T 603-1988 Chemical Reagent-Preparations of Reagent Solutions for Use in Test Methods
GB/T 1250-1989 Rules for Expression and Judgement of Limiting Values
GB/T 3049-1986 Chemical Products for Industrial Use - General Method for Determination of Iron Content - O-phenanthroline Spectrophotometric Method (eqv ISO 6685: 1982) GB/T 3051-2000 Inorganic Chemical Products for Industrial Use - General Method for Determination of Chloride Content - Mercurimetric Method (neq ISO 5790: 1979)
GH/T 3600-2000 Fertilizers-Determination of Ammoniacal Nitrogen Content-Formaldehyde Method
GB/T 6678-1986 General Principles for Sampling Chemical Products
GB/T 6682-1992 Water for Laboratory Use; Specifications (neq ISO 3696: 1987)

3. Requirements

Content
Foreword I
1. Scope
2. Normative References
3. Requirements
4 Test Methods
4.1 Determination of Moisture
4.2 Determination of Water Insoluble Matter Content
4.3 Determination of Chloride Content
4.4 Determination of Calcium Nitrate and Magnesium Nitrate Content
4.5 Determination of Sulfate Content
4.6 Determination of Sodium Nitrite Content
4.7 Determination of Sodium Carbonate Content
4.8 Determination of Ammonium Salt Content
4.9 Determination of Sodium Nitrate Content
4.10 Determination of Iron Content
4.11 Determination of Looseness
5 Inspection Rules
6 Marking and Label
7 Packaging, Transportation and Storage
8 Safety Requirements