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Dimethyl ether Produkt Beschreibung

CAS-Nr.115-10-6
Bezeichnung:
Englisch Name:Dimethyl ether
Synonyma:
RE170;dymela;RE-170;Dymel A;demeond;(CH3)2O;woodether;Wood ether;ether,methyl;METHYL OXIDE
CBNumber:CB8765901
Summenformel:C2H6O
Molgewicht:46.07
MOL-Datei:115-10-6.mol
Dimethyl ether physikalisch-chemischer Eigenschaften
Schmelzpunkt:: −141 °C(lit.)
Siedepunkt:: −24.8 °C(lit.)
Dichte: 1.617
Dampfdichte: 1.62 (vs air)
Dampfdruck: >760 mm Hg ( 25 °C)
Brechungsindex: 1.2984
Flammpunkt:: -41°C
Löslichkeit: 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.
Geruch (Odor): Chloroform-like; sweet.
Explosionsgrenze: 27%
Wasserlöslichkeit: soluble
Merck : 6071
BRN : 1730743
Stabilität:: Stable. Extremely flammable. Note low flash point. May form explosive mixtures with air. May form peroxides during prolonged storage.
CAS Datenbank: 115-10-6(CAS DataBase Reference)
NIST chemische Informationen: Dimethyl ether(115-10-6)
EPA chemische Informationen: Methane, oxybis-(115-10-6)
Sicherheit
Kennzeichnung gefährlicher: F+
R-Sätze:: 12
S-Sätze:: 9-16-33
RIDADR : UN 1033 2.1
WGK Germany : 1
RTECS-Nr.: PM4780000
F : 4.5-31
Selbstentzündungstemperatur: 662 °F
HazardClass : 2.1
Giftige Stoffe Daten: 115-10-6(Hazardous Substances Data)

Dimethyl ether Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSES GAS MIT CHARAKTERISTISCHEM GERUCH.
PHYSIKALISCHE GEFAHREN
Das Gas ist schwerer als Luft und kann sich am Boden ausbreiten. Fernzündung möglich. Das Gas kann sich in tiefer gelegenen Bereichen sammeln und den Luftsauerstoff verdrängen.
CHEMISCHE GEFAHREN
Bildung explosionsfähiger Peroxide unter Einfluss von Lichtund Luft. Beim Verbrennen Bildung reizender Rauche. Reagiert mit Oxidationsmitteln.
ARBEITSPLATZGRENZWERTE
TLV nicht festgelegt (ACGIH 2005).
EG Arbeitsplatz-Richtgrenzwerte: (als TWA) 1000 ppm; 1920 mg/m? (EU 2004).
MAK: 1000 ppm, 1900 mg/m? Spitzenbegrenzung: überschreitungsfaktor II(8); Schwangerschaft: Gruppe D; (DFG 2006).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation.
INHALATIONSGEFAHREN
Eine gesundheitsschädliche Konzentration des Gases in der Luft wird beim Entweichen aus dem Behälter sehr schnell erreicht, besonders in geschlossenen Räumen.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Augen und die Atemwege. Schnelle Verdampfung kann zu Erfrierungen führen. Möglich sind Auswirkungen auf das Zentralnervensystem. Exposition kann Bewusstseinstrübung verursachen.
LECKAGE
Gefahrenbereich verlassen! Fachmann zu Rate ziehen! Zündquellen entfernen. Persönliche Schutzausrüstung: Atemschutzfilter für organische Gase und Dämpfe..
R-Sätze Betriebsanweisung:
R12:Hochentzündlich.
S-Sätze Betriebsanweisung:
S9:Behälter an einem gut gelüfteten Ort aufbewahren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.
Chemische Eigenschaften
colourless gas
Chemische Eigenschaften
Dimethyl 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.
Verwenden
Dimethyl ether is used as a solvent in aerosol formulations.
Verwenden
Methyl ether is used as an aerosol propellantand in refrigeration.
Verwenden
Aerosol propellant; alternative diesel fuel; chemical intermediate.
Definition
ChEBI: An ether in which the oxygen atom is connected to two methyl groups.
Vorbereitung Methode
Dimethyl 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.
Allgemeine Beschreibung
Dimethyl 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 Reaktionen
Highly 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].
Reaktivität anzeigen
Dimethyl 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 Hazard
Inhalation 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 Hazard
Methyl 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.
Brandgefahr
Flash Point: Not pertinent (flammable gas); Flammable Limits in Air (%): 2-50; Fire Extinguishing Agents: Let fire burn; shut off gas flow; cool exposed surroundings with water; Fire Extinguishing Agents Not To Be Used: Not pertinent; Special Hazards of Combustion Products: Not pertinent; Behavior in Fire: Containers may explode. Vapors are heavier than air and may travel long distance to source of ignition and flash back; Ignition Temperature (°F): 662; Electrical Hazard: Data not available; Burning Rate: 6.6 mm/min.
Brandgefahr
Behavior in Fire: Containers may explode. Vapors are heavier than air and may travel long distance to a source of ignition and flash back.
Chemische Reaktivität
Reactivity 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.
Pharmazeutische Anwendungen
Dimethyl 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.
Sicherheitsprofil
Slightly 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.
Sicherheit(Safety)
Dimethyl 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
Lager
The 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.
läuterung methode
Dry 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
Inkompatibilitäten
Dimethyl 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 Status
Included 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.
Dimethyl ether Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Eisentrichlorid Methyljodid
Downstream Produkte
Anethol 3'-Amino-4'-methoxyacetanilid 2-Methoxybenzol-1,4-diammoniumsulfat 4-Bromanisol N-Methyl-anilin N-(4-Methoxy-3-nitrophenyl)acetamid Anisol 4-Iodanisol Cyan(3-phenoxyphenyl)methyl-2-(4-(difluormethoxy)phenyl)-3-methyl-butyrat
Dimethyl ether Anbieter Lieferant Produzent Hersteller Vertrieb Händler.      Global( 66)Lieferanten     
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Henan DaKen Chemical CO.,LTD.
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Mainchem Co., Ltd.
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Sinopharm Chemical Reagent Co,Ltd. 86-21-63210123
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Beijing HuaMeiHuLiBiological Chemical 010-56205725;010-86181995
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(CSR Factory)China Skyrun Industrial CO.,ltd Please Email
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TOKYO CHEMICAL INDUSTRY CO., LTD. 03-3668-0489
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