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)
• vapor pressure: >760 mmHg ( 25 °C)
• assay: ≥99%
• autoignition temp.: 662 °F
• expl. lim.: 27 %
• bp: −24.8 °C (lit.)
• mp: −141 °C (lit.)
• 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.

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.

Dimethyl ether (DME) can be used as a precursor to synthesize methyl acetate, oligomeric oxymethylene ethers (OMEs), polyoxymethylene dimethyl ethers (DMMx) and light olefins.

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)