What is "dimethyl ether"

Methyl \Meth"yl\, n. [See Methylene.] (Chem.) A univalent hydrocarbon radical, CH3-, not existing alone but regarded as an essential residue of methane, and appearing as a component part of many derivatives; as, methyl alcohol, methyl ether, methyl amine, etc. [Formerly written also methule, methyle, etc.]

Methyl alcohol (Chem.), a light, volatile, inflammable liquid, CH3.OH, obtained by the distillation of wood, and hence called wood alcohol or wood spirit; tecnically referred to as methanol; -- called also methol, carbinol, etc.

Methyl amine (Chem.), a colorless, inflammable, alkaline gas, CH3.NH2, having an ammoniacal, fishy odor. It is produced artificially, and also occurs naturally in herring brine and other fishy products. It is regarded as ammonia in which a third of its hydrogen is replaced by methyl, and is a type of the class of substituted ammonias.

Methyl ether (Chem.), a light, volatile ether CH3.O.CH3, obtained by the etherification of methyl alcohol; -- called also methyl oxide or dimethyl ether.

Methyl green. (Chem.) See under Green, n.

Methyl orange. (Chem.) See Helianthin.

Methyl violet (Chem.), an artificial dye, consisting of certain methyl halogen derivatives of rosaniline.

n. (context organic compound English) The simplest ether; that derived from methanol (CH₃OCH₃)

Dimethyl ether (DME), also known as methoxymethane, is the organic compound with the formula CHOCH, simplified to CHO. The simplest ether, it is a colorless gas that is a useful precursor to other organic compounds and an aerosol propellant and is being studied as a future energy option. It is an isomer of ethanol.

Table 1. Experimental Vapor Pressures of Dimethyl Ether

T/K

Pexp/kPa

T/K

Pexp/kPa

T/K

Pexp/kPa

233.128

54.61

298.172

596.21

348.147

2022.45

238.126

68.49

303.160

687.37

353.146

2242.74

243.157

85.57

305.160

726.26

353.158

2243.07

248.152

105.59

308.158

787.07

358.145

2479.92

253.152

129.42

313.156

897.59

363.148

2735.67

258.160

157.53

316.154

968.55

368.158

3010.81

263.160

190.44

318.158

1018.91

373.154

3305.67

268.161

228.48

323.148

1152.35

378.150

3622.60

273.153

272.17

328.149

1298.23

383.143

3962.25

278.145

321.87

333.157

1457.50

388.155

4331.48

283.160

378.66

333.159

1457.76

393.158

4725.02

288.174

443.57

338.154

1631.01

398.157

5146.82

293.161

515.53

343.147

1818.80

400.378

5355.8