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295299

Sigma-Aldrich

二甲醚

≥99%

别名:

甲醚

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About This Item

线性分子式:
(CH3)2O
CAS号:
115-10-6
分子量:
46.07
Beilstein:
1730743
EC 号:
204-065-8
MDL编号:
MFCD00008494
UNSPSC代码:
12142100
PubChem化学物质编号:
24857771
NACRES:
NA.22
价格与库存信息目前不能提供

蒸汽密度

1.62 (vs air)

蒸汽压

>760 mmHg ( 25 °C)

方案

≥99%

自燃温度

662 °F

expl. lim.

27 %

沸点

−24.8 °C (lit.)

mp

−141 °C (lit.)

官能团

ether

SMILES字符串

COC

InChI

1S/C2H6O/c1-3-2/h1-2H3

InChI key

LCGLNKUTAGEVQW-UHFFFAOYSA-N

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一般描述

Dimethyl ether (DME) is the simplest aliphatic ether used as a reactant as well as a solvent in organic synthesis. It is used as a precursor for the preparation of important useful organic compounds. DME is also used as an aerosol propellant.[1][2][3]

应用

DME can be used as precursor for the production dimethyl sulfate by treatment with sulfur trioxide. Dimethyl sulfate is employed as a versatile methylating agent in chemical synthesis. It is also used as a starting material for preparation of dimethyl sulfide, acetic acid, unsaturated and saturated hydrocarbons, and formadehyde.[1]
Dimethyl ether (DME) can be used as a precursor to synthesize methyl acetate,[4][5][6] oligomeric oxymethylene ethers (OMEs),[7] polyoxymethylene dimethyl ethers (DMMx)[8] and light olefins.[9]

包装

Supplied in a Sure/Pac™ cylinder and has a brass needle valve with a male 1/4" NPTF outlet thread installed. Before using the cylinder, ensure that the valve is closed, then remove the galvanized steel hex cap that seals the outlet valve.

Compatible with the following:

法律信息

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

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象形图

FlameGas cylinder
GHS02,GHS04

警示用语：

Danger

危险声明

H220,H280

危险分类

Flam. Gas 1A - Press. Gas Liquefied gas

储存分类代码

2A - Gases

WGK

WGK 1

闪点(°F)

-41.8 °F - closed cup

闪点(°C)

-41 °C - closed cup

个人防护装备

Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
SHBS6635
SHBS1412
SHBR0426
SHBQ2999
SHBN9987

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二甘醇二甲醚 anhydrous, 99.5%

Sigma-Aldrich

281662

二甘醇二甲醚

氯甲烷 ≥99.5%

Sigma-Aldrich

295507

氯甲烷

2,2,2-三氟乙醚 98%

Sigma-Aldrich

287571

2,2,2-三氟乙醚

Dimethyl ether
Muller M, et al.
Ullmann's Encyclopedia of Industrial Chemistry (2000)
Dimethyl ether carbonylation to methyl acetate over highly crystalline zeolite seed-derived ferrierite.
Kim J, et al.
Catalysis Science & Technology, 8(12), 3060-3072 (2018)
Nature and Location of Carbonaceous Species in a Composite HZSM-5 Zeolite Catalyst during the Conversion of Dimethyl Ether into Light Olefins.
Iba?ez M, et al.
Catalysts, 7(9), 254-254 (2017)
Carbonylation of dimethyl ether over Co-HMOR.
Ma M,et al.
Catalysis Science & Technology, 8(8), 2124-2130 (2018)
Synthesis of Polyoxymethylene Dimethyl Ethers from Dimethyl Ether Direct Oxidation over Carbon?Based Catalysts.
Gao X-Y, et al.
ChemCatChem, 10(1), 273-279 (2018)
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Questions

1–2 of 2 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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