This standard specifies technical requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of oxalic acid for industrial use.
This standard applies to the production, inspection and sale of oxalic acid for industrial use produced by generator gas and sodium hydroxide synthesis (hereinafter referred to as the “synthesis method”) or oxidation of glucose by nitric acid (hereinafter referred to as the “oxidation method”).
Molecular formula: H2C2O4·2H2O
Relative molecular mass: 126.07 (based on international Atomic Weights of the Elements 2005)
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding any 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 indicated below. For any undated references, the latest edition of the document referred to applies.
GB/T 601-2002 Chemical reagent - Preparations of standard volumetric solutions
GB/T 602-2002 Chemical reagent - Preparations of standard solutions for impurity (ISO 6353-1:1982, NEQ)
GB/T 603-2002 Chemical reagent - Preparations of reagent solutions for use in test methods (ISO 6353-1:1982, NEQ)
GB/T 1250 Rules for expression and judgment of limiting values
GB/T 3049-2006 Chemical products for industrial use - General method for determination of iron content - 1,10-Phenanthroline spectrophotometric method (ISO 6685:1982, IDT)
GB/T 6678-2003 General principles for sampling chemical products
GB/T 6679-2003 General rules for sampling solid chemical products
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods (ISO 3696:1987, MOD)
GB/T 7531 Determination of ignition residue for organic chemical products (GB/T 7531-2008, ISO 6353-1:1982, NEQ)
GB/T 7532 Determination of heavy metals in organic chemical products - Visual colorimetry
GB/T 8947 Composite plastic woven sack
GB/T 9723 Chemical reagent - General rule for flame atomic absorption spectrometric analysis
3 Classification and designation
The products are classified by production process of oxalic acid into Type I and Type II. Type I is applicable to oxalic acid produced by synthesis method, and Type II is applicable to oxalic acid produced by oxidation method.
4 Appearance
White crystals.
5 Requirements
Oxalic acid for industrial use shall meet the technical requirements specified in Table 1.
Foreword i 1 Scope 2 Normative references 3 Classification and designation 4 Appearance 5 Requirements 6 Test methods 7 Inspection rules 8 Marking, packaging, transportation and storage
