High-purity sodium hydroxide
1 Scope
This standard specifies the requirements, sampling, test methods, inspection rules and marking, packaging, transportation and storage, and safety of high-purity sodium hydroxide.
This standard is applicable to sodium hydroxide products produced by electrolysis of sodium chloride aqueous solution.
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 190 Packing symbol of dangerous goods
GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2000, eqv ISO 780: 1997)
GB/T 1250 Rules for expression and judgment of limiting values
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 4348.3-2002, eqv ISO 983: 1974)
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 7698 Sodium hydroxide for industrial use - Determination of carbonates content - Titrimetric method [GB/T 7698-2003. MOD ISO 3196: 1975 (2002)]
GB/T 11200.1 Membrane process sodium hydroxide - Determination of sodium chlorate content - Tolidine spectrometric method
GB/T 11200.2 Membrane process sodium hydroxide - Determination of aluminum oxide content - Spectrometric method (GB/T 11200.2-1989, neq ISO 6353-1: 1982)
GB/T 11200.3 Membrane process sodium hydroxide - Determination of calcium contents - Flame atomic absorption method (GB/T 11200.3-1989, neq ISO 3697: 1976)
GB/T 11213.1 Sodium hydroxide for chemical fiber - Determination method of mass fraction (GB/T 11213.1-1989, idt ISO 979: 1974)
GB/T 11213.2 Sodium hydroxide for chemical fiber use - Determination of sodium chloride content - Spectrometric method (GB/T 11213.2-1989, idt ISO 3197: 1975)
GB/T 11213.4 Sodium hydroxide for chemical fiber use - Determination of silicon mass fraction - Reduced molybdo silicate spectrometric method (GB/T 11213.4-1989, neq ISO 984: 1985)
GB/T 11213.5 Sodium hydroxide for chemical fiber use - Determination of sulphate mass fraction - Barium sulphate gravimetric method (GB/T 11213.5-1989, eqv ISO 982: 1976)
GB/T 11213.6 Sodium hydroxide for chemical fiber use - Determination of sulphate mass fraction - Turbidimetric method (GB/T 11213.6-1989, eqv ISO 6353-1: 1982)
GB/T 15915 Packing containers - Caustic alkali steel drum
3 Symbols
For the purpose of this standard, the following symbols apply.
HS——High-purity solid sodium hydroxide.
HL——High-purity liquid sodium hydroxide.
4 Requirements
Foreword i
1 Scope
2 Normative references
3 Symbols
4 Requirements
5 Sampling
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
9 Safety
