295299

Dimethyl ether

≥99%

• Synonym(s): DME, Methyl ether
• Linear Formula: (CH₃)₂O
• CAS Number: 115-10-6
• Molecular Weight: 46.07
• Beilstein/REAXYS Number: 1730743
• EC Number: 204-065-8
• MDL number: MFCD00008494
• UNSPSC Code: 12142100
• PubChem Substance ID: 24857771
• NACRES: NA.22

Properties

• vapor density: 1.62 (vs air)
• Quality Level: 100
• vapor pressure: >760 mmHg ( 25 °C)
• assay: ≥99%
• autoignition temp.: 662 °F
• expl. lim.: 27 %
• bp: −24.8 °C (lit.)
• mp: −141 °C (lit.)
• functional group: ether
• SMILES string: COC
• InChI: 1S/C2H6O/c1-3-2/h1-2H3
• InChI key: LCGLNKUTAGEVQW-UHFFFAOYSA-N

Description

General description

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]

Application

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]

Packaging

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:

• Aldrich^® Sure/Pac^™ station for liquefied gases Z566446
• PTFE Sealing tape Z104388 or Z221880
• Brass hose adapter Z146811
• Aldrich^® mini gas regulator Z513539

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC

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

Safety Information

• pictograms: GHS02,GHS04
• signalword: Danger
• hcodes: H220,H280
• pcodes: P210 - P377 - P381 - P410 + P403
• Hazard Classifications: Flam. Gas 1A - Press. Gas Liquefied gas
• Storage Class: 2A - Gases
• wgk_germany: WGK 1
• flash_point_f: -41.8 °F - closed cup
• flash_point_c: -41 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)