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Dimethyl ether

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Products Intro: Product Name:Dimethyl ether
CAS:115-10-6
Purity:99% Package:100g,500g,1KG,10KG,100KG
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Products Intro: Product Name:Dimethyl ether
CAS:115-10-6
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CAS:115-10-6
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Products Intro: Product Name:Methyl Ether (in cylinder without valve)
CAS:115-10-6
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Dimethyl ether Basic information
Product Name:Dimethyl ether
Synonyms:(CH3)2O;Methoxymethane;Dimethyl ether,Methyl ether;Dimethyl Ether Dimethyl Oxide Methyl Oxide;Methane, 1,1'-oxybis-;DiMethyl ether >=99%;demeond;Dymel A
CAS:115-10-6
MF:C2H6O
MW:46.07
EINECS:204-065-8
Product Categories:Chemical Synthesis;Specialty Gases;Organics;Ethers (Low Boiling point);Gas Cylinders;Synthetic Reagents;Synthetic Organic Chemistry
Mol File:115-10-6.mol
Dimethyl ether Structure
Dimethyl ether Chemical Properties
Melting point −141 °C(lit.)
Boiling point −24.8 °C(lit.)
density 1.617
vapor density 1.62 (vs air)
vapor pressure >760 mm Hg ( 25 °C)
refractive index 1.2984
Fp -41°C
solubility Soluble in acetone, chloroform, ethanol (95%), ether, and 1 in 3 parts of water. Dimethyl ether is generally miscible with water, nonpolar materials, and some semipolar materials. For pharmaceutical aerosols, ethanol (95%) is the most useful cosolvent. Glycols, oils, and other similar materials exhibit varying degrees of miscibility with dimethyl ether.
OdorChloroform-like; sweet.
explosive limit27%
Water Solubility soluble
Merck 6071
BRN 1730743
Stability:Stable. Extremely flammable. Note low flash point. May form explosive mixtures with air. May form peroxides during prolonged storage.
CAS DataBase Reference115-10-6(CAS DataBase Reference)
NIST Chemistry ReferenceDimethyl ether(115-10-6)
EPA Substance Registry SystemMethane, oxybis-(115-10-6)
Safety Information
Hazard Codes F+
Risk Statements 12
Safety Statements 9-16-33
RIDADR UN 1033 2.1
WGK Germany 1
RTECS PM4780000
4.5-31
Autoignition Temperature662 °F
HazardClass 2.1
Hazardous Substances Data115-10-6(Hazardous Substances Data)
MSDS Information
ProviderLanguage
SigmaAldrich English
Dimethyl ether Usage And Synthesis
Chemical Propertiescolourless gas
Chemical PropertiesDimethyl ether is a liquefied gas and exists as a liquid at room temperature when contained under its own vapor pressure, or as a gas when exposed to room temperature and pressure.
It is a clear, colorless, virtually odorless liquid. In high concentrations, the gas has a faint ether-like odor.
UsesDimethyl ether is used as a solvent in aerosol formulations.
UsesAerosol propellant; alternative diesel fuel; chemical intermediate.
UsesMethyl ether is used as an aerosol propellantand in refrigeration.
DefinitionChEBI: An ether in which the oxygen atom is connected to two methyl groups.
Production MethodsDimethyl ether is prepared by the reaction of bituminous or lignite coals with steam in the presence of a finely divided nickel catalyst. This reaction produces formaldehyde, which is then reduced to methanol and dimethyl ether. Dimethyl ether may also be prepared by the dehydration of methanol.
General DescriptionDimethyl ether is a colorless gas with a faint ethereal odor. Dimethyl ether is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbite. Dimethyl ether is easily ignited. Its vapors are heavier than air. Any leak can be either liquid or vapor. Dimethyl ether can asphyxiate by the displacement of air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket.
Air & Water ReactionsHighly flammable. Upon standing and exposure to air (oxygen) tendency to form explosive peroxides. When ethers containing peroxides are heated (distilled) they can detonate [Lewis, 3rd ed., 1993, p. 854].
Reactivity ProfileDimethyl ether is a colorless, highly flammable gas (b. p. -24° C), slightly toxic. Very dangerous fire and explosion hazard when exposed to flame, sparks, heat or strong oxidizers. Violent reaction with aluminum hydride, lithium aluminum hydride. Upon standing and exposure to air (oxygen) tendency to form explosive peroxides. When ethers containing peroxides are heated (distilled) they can detonate [Lewis, 3rd ed., 1993, p. 854].
Health HazardInhalation produces some anesthesia (but less than that of ethyl ether), blurring of vision, headache, intoxication, loss of consciousness. Liquid or concentrated vapor irritates eyes. Contact of liquid with skin may cause frostbite.
Health HazardMethyl ether produced low inhalation toxicity in rats. Caprino and Togna (1975)reported a 30-minute LC50 value of 396 ppmfor rats. In lethal doses it caused sedation,a gradual depression of motor activity, lossof the sighting reflex, hypopnea, coma, anddeath in mice. Exposure to a 40% mixtureof methyl ether in air resulted in an initialslight increase in heart rate in rabbits, whichwas followed by depression of arterial bloodpressure. Death occurred in 45 minutes. Thearterial and venous partial oxygen pressurewas found to decrease while the venous CO2pressure and the blood pH increased
Reuzel et al. (1981) reported that sub chronic inhalation of methyl ether in ratsdid not cause significant adverse effects.No noticeable effect on organ and bodyweights and no treatment-related changeswere observed. In humans, adverse healtheffect from inhalation of this compoundshould be minimal. However, inhalation ofexcessive quantities can produce intoxicationand loss of consciousness.
Fire HazardBehavior in Fire: Containers may explode. Vapors are heavier than air and may travel long distance to a source of ignition and flash back.
Chemical ReactivityReactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
Pharmaceutical ApplicationsDimethyl ether may be used as an aerosol propellant for topical aerosol formulations in combination with hydrocarbons and other propellants. Generally, it cannot be used alone as a propellant owing to its high vapor pressure. Dimethyl ether is a good solvent and has the unique property of high water solubility, compared to other propellants. It has frequently been used with aqueous aerosols. A coarse, wet, spray is formed when dimethyl ether is used as a propellant.
Dimethyl ether is also used as a propellant in cosmetics such as hair sprays,and in other aerosol products such as air fresheners and fly sprays.
Dimethyl ether is additionally used as a refrigerant.
Safety ProfileSlightly toxic by inhalation. Very dangerous fire hazard when exposed to heat, flame, or oxidzers. Dangerous explosion hazard when exposed to flame, sparks, etc. Violent reaction with AH3 and LiAlH2. Keep in closed container away from heat and open flame. To fight fire, stop flow of gas. When heated to decomposition it emits acrid smoke and irritating fumes.
SafetyDimethyl ether may be used as a propellant and solvent in topical pharmaceutical aerosols, and is generally regarded as an essentially nontoxic and nonirritant material when used in such applications. However,inhalation of high concentrations of dimethyl ether vapor is harmful. Additionally, skin contact with dimethyl ether liquid may result in freezing of the skin and severe frostbite.
When used in topical formulations, dimethyl ether may exert a chilling effect on the skin, although if it is used as directed the propellant quickly vaporizes and is nonirritating.
LD50 (mouse, inhalation): 386000ppm/30min
LD50 (rat, inhalation): 308g/m3
storageThe liquefied gas is stable when used as a propellant. However, exposure to the air for long periods of time may result in explosive peroxides being slowly formed.
Solutions of liquid dimethyl ether should not be concentrated either by distillation or by evaporation. Dimethyl ether should be stored in tightly closed metal cylinders in a cool, dry place.
Purification MethodsDry methyl ether by passing over alumina and then BaO, or over CaH2, followed by fractional distillation at low temperatures. Its solubility is 37mL per mL of H2O at 18o, and it is very soluble
IncompatibilitiesDimethyl ether is an aggressive solvent and may affect the gasket materials used in aerosol packaging. Oxidizing agents, acetic acid, organic acids, and anhydrides should not be used with dimethyl ether.
Regulatory StatusIncluded in the FDA Inactive Ingredients Database (topical aerosols). Included in nonparenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.
Tag:Dimethyl ether(115-10-6) Related Product Information
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