YS/T 672-2008 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 672-2008	359	Add to Cart	3 days	Dimethyl carbonate	Obsolete

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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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