Methylene chloride for industrial use
1 Scope
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage and safety of methylene chloride for industrial use.
This standard is applicable to the production, inspection and sales of methylene chloride produced by methanol hydrochlorination process. This product is mainly used in solvents, extractants, cleaning agents, foaming agents, release agents, etc., and is also used as raw material for producing difluoromethane (HFC-32) and pharmaceutical industry.
Molecular formula: CH2Cl2
Relative molecular mass: 84.932 (as per the international relative atomic mass in 2005).
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 of the normative document applies.
GB 190-1990 Labels for packages of dangerous goods
GB/T 191-2000 Packaging - Pictorial marking for handling of goods
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 603 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 3143-1982 Color determination method of liquid chemicals (Hazen unit - Platinum-cobalt scale)
GB/T 6283-1986 Chemical products-Determination of water-Karl fischer method (general method)
GB/T 6324.2-2004 Test method of organic chemical products - Part 2: Determination of dry residue after evaporation on a water bath for volatile organic liquids
GB/T 6678-2003 General principles for sampling chemical products
GB/T 6680-2003 General rules for sampling liquid chemical products
GB/T 6682-1992 Water for analytical laboratory use - Specification and test methods (eqv ISO 3696:1987)
GB/T 21541-2008 Determination of chlorhydrocarbon content in coatings - Gas chromatographic method
3 Requirements
3.1 Appearance: colorless and clear liquid without suspended matter and mechanical impurities.
3.2 The methylene chloride for industrial use shall meet the technical indexes specified in Table 1.
Foreword I
Methylene chloride for industrial use
1 Scope
2 Normative references
3 Requirements
4 Test method
5 Inspection rules
6 Marking, packaging, transportation and storage
7 Safety
