High-purity sodium hydroxide
Warning — If proper preventive measures are not taken, the products covered by this document may be in danger during production, transportation, handling, storage and use. This document is not intended to suggest all safety issues related to this product. It is the responsibility of the users of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1 Scope
This document specifies the appearance, physical and chemical properties and other technical requirements of high-purity sodium hydroxide as well as describe its related sampling, test methods, inspection rules, marking, labeling and accompanying documents, packaging, transportation and storage.
This document is applicable to production, use and quality control of sodium hydroxide products produced by electrolysis of sodium chloride aqueous solution.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 190 Packing symbol of dangerous goods
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 209-2018 Sodium hydroxide for industrial use
GB/T 4348.1 Sodium hydroxide for industrial use - Determination of sodium hydroxide and sodium carbonate content
GB/T 4348.3 Sodium hydroxide for industrial use - Determination of iron content－1,10－phenanthroline photometric method
GB/T 6678 General principles for sampling chemical products
GB/T 6679 General rules for sampling solid chemical products
GB/T 6680 General rules for sampling liquid chemical products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 7698 Sodium hydroxide for industrial use - Determination of carbonates content - Titrimetric method
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 11200.1 Sodium hydroxide for industrial use - Determination of sodium chlorate content - O-Tolidine spectrometric method
GB/T 11200.2 Test methods of high-purity sodium hydroxide - Part 2: determination of aluminum oxide content - Spectrometric method
GB/T 11200.3 Test methods of high-purity sodium hydroxide - Part 3: Determination of calcium content - Flame atomic absorption method
GB/T 11213.1 Sodium hydroxide for chemical fiber use - Determination of sodium hydroxide content
GB/T 11213.2 Sodium hydroxide for chemical fiber use - Determination of sodium chloride content - Spectrometric method
GB/T 11213.4 Sodium hydroxide for chemical fiber use - Determination of silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 11213.5 Sodium hydroxide for chemical fiber use - Determination of sulphate content
GB 15258 General rules for preparation of precautionary label for chemicals
GB/T 31197-2014 Inorganic chemicals for industrial use - Determination of impurity anions - Ion chromatography method
HG/T 3942 Sodium hydroxide for industrial use - Determination of metal and nonmetal ions content - ICP method
3 Terms and definitions
No terms and definitions are listed in this document.
4 Symbols
For the purposes of this document, the following symbols apply.
HL——High-purity liquid sodium hydroxide.
HS——High-purity solid sodium hydroxide.
5 Technical requirements
6 Sampling
7 Test methods
8 Inspection rules
9 Marking, labeling and accompanying documents
10 Packaging, transportation and storage
Annex B
(Informative)
Typical ClO₃⁻ ion chromatogram
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Technical requirements
6 Sampling
7 Test methods
8 Inspection rules
9 Marking, labeling and accompanying documents
10 Packaging, transportation and storage
Annex B (Informative) Typical ClO₃⁻ ion chromatogram
