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Dimethyl carbonate
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YS/T 672-2008
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PDF similar to YS/T 672-2008
Standard similar to YS/T 672-2008 SH/T 1499.10 SH/T 1499.7 SH/T 1499.1 Basic data | Standard ID | YS/T 672-2008 (YS/T672-2008) | | Description (Translated English) | Dimethyl carbonate | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | G17 | | Classification of International Standard | 77.080.70 | | Word Count Estimation | 9,965 | | Date of Issue | 2008-03-12 | | Date of Implementation | 2008-09-01 | | Quoted Standard | GB 190; GB/T 1250; GB/T 3143; GB/T 4472; GB/T 6283; GB/T 6680; GB/T 8170; GB/T 9722; GB/T 9736 | | Regulation (derived from) | NDRC Notice No. 25 of 2008 | | Issuing agency(ies) | National Development and Reform Commission | | Summary | This standard specifies the technical requirements of dimethyl carbonate, test methods, inspection rules and signs, packaging, transportation, storage, quality certificates, purchase order (or contract) content and security. This standard applies to propylene carbonate and methanol obtained by transesterification of dimethyl carbonate products, which are widely used for making low-boiling solvents, cleaning agents, propellants and special paint solvents. | YS/T 672-2008: Dimethyl carbonate---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Dimethyl carbonate
ICS 77.080.70
G17
People's Republic of China Nonferrous Metals Industry Standard
Dimethyl carbonate
Posted 2008-03-12
2008-09-01 implementation
National Development and Reform Commission issued
Foreword
The Standard Appendix A, Appendix B, Appendix C is informative appendix.
This standard by the National Standardization Technical Committee of non-ferrous metals and centralized.
This standard by Tongling Nonferrous Metals Group Holdings Co., Ltd. is responsible for drafting.
The main drafters of this standard. plum branch rudder, Wang Guizhen, take the yellow leaf, Yinfang Xi, Sheng Zhongyi, Bi Jianming.
Dimethyl carbonate
1 Scope
This standard specifies the technical requirements of dimethyl carbonate, test methods, inspection rules and signs, packaging, transportation, storage, quality certificate,
Purchase order (or contract) content and security.
This standard applies to the propylene carbonate and methanol transesterification method were dimethyl carbonate product that is widely used to produce low-boiling
Solvents, cleaning agents, propellants and special paint solvents.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB 190 packaging and marking of dangerous goods
Representation GB/T 1250 limit values and the method of determining
GB/T 3143 Determination of color liquid chemicals (Hazen unit - platinum - cobalt color number)
GB/T 4472 chemical product density, relative density measurement General
GB/T 6283 Determination of moisture content of chemical products Karl Fischer method (General method)
GB/T 6680 General rules for sampling liquid chemical products
GB/T 8170 numerical rounding rules
GB/T 9722 General chemical reagent gas chromatography
GB/T 9736 Determination of alkalinity and acidity Chemicals general method
3 Technical requirements
3.1 Product names and classification
Dimethyl carbonate according to the main content is divided into three grades. high purity level (battery grade), superior grade, first grade.
Dimethyl carbonate structural formula.
COCH 3 O CH 3
Molecular formula. C3H6O3, molecular weight. 90.08 (according to 2001 international relative atomic weight).
3.2 Technical Specifications
Dimethyl carbonate major technical indicators should be consistent with Table 1.
Table 1 dimethyl carbonate major technical indicators
project
index
High purity level (battery grade) Excellent grade First grade
Dimethyl carbonate content (mass fraction) /% ≥99.9 ≥99.8 ≥99.5
Moisture (mass fraction) /% ≤0.0020 ≤0.020 ≤0.10
Methanol content (mass fraction) /% ≤0.0020 ≤0.050 ≤0.20
Chroma (Pt-Co) ≤5 ≤5 ≤10
Acidity (calcimeter)/(mmol/100g) ≤0.025 ≤0.025 ≤0.025
Density (25 ℃)/(g/cm3) 1.071 ± 0.005
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