2-Methoxy-ethanol Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Bildung explosionsf?higer Peroxide. Reagiert mit starken Oxidationsmitteln. Feuer und Explosionsgefahr. Greift einige Kunststoff- und Beschichtungsarten an.
ARBEITSPLATZGRENZWERTE
TLV: 5 ppm (als TWA); Hautresorption; BEI vorhanden; (ACGIH 2005)
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation, über die Haut und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20 °C kann schnell eine gesundheitssch?dliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Die Substanz reizt leicht die Augen und die Atmungsorgane. M?glich sind Auswirkungen auf Zentralnervensystem, Blut, Knochenmark, Nieren und Leber. Exposition in hohen Konzentrationen kann zu Bewusstlosigkeit führen. ?rztliche Beobachtung notwendig.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Die Flüssigkeit entfettet die Haut. M?glich sind Auswirkungen auf Blutund Knochenmark. Führt zu Blutarmutund Blutzellsch?digungen. Kann fruchtbarkeitssch?digend oder entwicklungssch?digend wirken.
LECKAGE
Belüftung. Zündquellen entfernen. Ausgelaufene Flüssigkeit m?glichst in abdichtbaren Beh?ltern sammeln. Reste mit viel Wasser wegspülen. Pers?nliche Schutzausrüstung: Atemschutzfilter für organische Gase und D?mpfe.
R-S?tze Betriebsanweisung:
R60:Kann die Fortpflanzungsf?higkeit beeintr?chtigen.
R61:Kann das Kind im Mutterleib sch?digen.
R10:Entzündlich.
R20/21/22:Gesundheitssch?dlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R39/23/24/25:Giftig: ernste Gefahr irreversiblen Schadens durch Einatmen, Berührung mit der Haut und durch Verschlucken.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R11:Leichtentzündlich.
R35:Verursacht schwere Ver?tzungen.
S-S?tze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
Aussehen Eigenschaften
C3H8O2; 2-Methoxyethanol, Methylglycol, Methylcellosolve, 1-Hydroxy-2-methoxy-ethan. Farblose Flüssigkeit mit mildem, etherischem, angenehmen Geruch. Mit Wasser mischbar.
Gefahren für Mensch und Umwelt
Kann die Fortpflanzungsfähigkeit beeinträchtigen. Kann das Kind im Mutterleib schädigen.
Auch gesundheitsschädlich beim Einatmen, Verschlucken, Berührung mit der Haut.
Kann zu Lungenödem, Schädigung der Nieren, Blut und Hoden und Störung der Hirnfunktionen führen.
Starke Hautresorption.
Entzündlich. Nicht stark Erhitzen. Nicht mit Aluminium, Leichtmetallen oder Oxidationsmittel (u. a. Luft/Sauerstoff) in Berührung bringen.
Als gefährliche Zersetzungsprodukte können sich Peroxide bilden.
LD
50 (oral, Ratte): 2490 mg/kg.
Schutzma?nahmen und Verhaltensregeln
Unter Stickstoff lagern.
Schutzhandschuhe als kurzzeitiger Spritzschutz.
Verhalten im Gefahrfall
Substanzkontakt vermeiden. Dämpfe/Aerosole nicht einatmen.
Mit flüssigkeitsbindendem Material, z. B. Rench Rapid aufnehmen. Der Entsorgung zuführen. Nachreinigen.
Wasser, Kohlendioxid, Pulver, Schaum.
Brennbar. Mit Luft Bildung explosionsfähiger Gemische möglich. Dämpfe schwerer als Luft.
Erste Hilfe
Nach Hautkontakt: Mit reichlich Wasser abwaschen.
Nach Augenkontakt: Mit reichlich Wasser und geöffnetem Lidspalt mindestens 10 Minuten ausspülen. Augenarzt hinzuziehen.
Nach Einatmen: Frischluft. Atemwege freihalten.
Nach Verschlucken: Viel Wasser mit Aktivkohlezusatz trinken. Arzt hinzuziehen.
Nach Kleidungskontakt: Kontaminierte Kleidung sofort entfernen.
Ersthelfer: siehe gesonderten Anschlag
Sachgerechte Entsorgung
Als halogenfreie, organische Lösemittelabfälle.
Beschreibung
2-Methoxyethanol (2-ME), also known as ethylene glycol monomethyl ether, is a glycol ether that has been known since the 1920s, but its use significantly increased in the 1970s. Methoxyethanol is an E-series glycol ether derived from methanol and ethylene oxide. Other commonly used glycol ethers include ethoxyethanol, butoxyethanol, and methoxypropanol.
Chemische Eigenschaften
2-Methoxyethanol is a colorless liquid with a slight ethereal odor. The Odor Threshold is 0.9 2.3 ppm. It is miscible with water and with aliphatic and aromatic hydrocarbons. It is a solvent for essential oils, lignin, dammar, Elemi Essential Oil, ester gum, kauri, mastic, rosin, sandarac resin, shellac, Zanzibar, nitrocellulose, cellulose acetate, alcohol-soluble dyes, and many synthetic resins. Its solvency far cellulose esters are augmented when a ketone or halogenated hydrocarbon Is added.
Physikalische Eigenschaften
Colorless liquid with a mild, ether-like odor. Experimentally determined detection and recognition
odor threshold concentrations were <300 μg/m
3 (<96 ppb
v) and 700 μg/m
3 (220 ppb
v), respectively
(Hellman and Small, 1974).
Verwenden
2-Methoxyethanol is considered a non-comedogenic raw material. It is used as a solvent in nail products and as a stabilizer in cosmetic emulsions. It is able to penetrate the skin and may cause skin irritation.
Definition
ChEBI: 2-methoxyethanol is a hydroxyether that is ethanol substituted by a methoxy group at position 2. It has a role as a protic solvent and a solvent.
synthetische
From Methanol Plus Ethylene glycol,
by heating under pressure.
Allgemeine Beschreibung
A clear colorless liquid. Flash point of 110°F. Less dense than water. Vapors are heavier than air.
Air & Water Reaktionen
Flammable. Water soluble.
Reaktivit?t anzeigen
2-Methoxyethanol is incompatible with oxygen and strong oxidizing agents. Contact with bases may result in decomposition. Incompatible with acid chlorides and acid anhydrides. . 2-Methoxyethanol forms explosive peroxides.
Hazard
Toxic by ingestion and inhalation. Moderate fire risk. Toxic by skin absorption. Questionable
carcinogen.
Health Hazard
2-Methoxyethanol is a teratogen and a chronic inhalation toxicant. The target organs are blood, kidney,and the central nervous system. In addi tion to inhalation, the other routes of expo sure are absorption through the skin, and ingestion. Animal studies indicated that over-exposure to this compound produced anemia, hematuria, and damage to the testes.In humans, inhalation of EGME vapors cancause headache, drowsiness, weakness, irrita tion of the eyes, ataxia, and tremor. The acuteinhalation toxicity, however, is low and anytoxic effect may be felt at a concentration ofabout 25–30 ppm in air
The oral and dermal toxicities of thiscompound in test animals were found to belower than the inhalation toxicity. Ingestioncan produce an anesthetic effect and in alarge dosage can be fatal. An oral intake ofabout 200 mL may cause death to humans.
LC50 value (mice): 1480 ppm/7 h,
LD50 value (rabbits): 890 mg/kg
EGME is a teratogen exhibiting fetotoxi city, affecting the fertility and the litter size,and causing developmental abnormalities inthe urogenital and musculoskeletal systemsin test animals.
Brandgefahr
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Sicherheitsprofil
2-Methoxyethanol is moderately toxic to humans if ingested. Moderately toxic experimentally by ingestion, inhalation, shin contact, intraperitoneal, and intravenous routes. Human systemic effects by inhalation: change in motor activity, tremors, and convulsions. Experimental teratogenic and reproductive effects. A skin and eye irritant. Mutation data reported. When used under conditions that do not require the application of heat, thts material probably presents little hazard to health. However, in the manufacture of fused collars which require pressing with a hot iron, cases have been reported showing disturbance of the hemopoietic system with or without neurologcal signs and symptoms. The blood picture may resemble that produced by exposure to benzene. Two cases reported had severe aplastic anemia with tremors and marked mental dullness. The persons affected had been exposed to vapors of methyl "Cellosolve," ethanol, methanol, ethyl acetate, and petroleum naphtha. flame. A moderate explosion hazard. Can react with oxidizing materials to form explosive peroxides. To fight fire, use alcohol foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also GLYCOL ETHERS. Flammable liquid when exposed to heat or
m?gliche Exposition
2-Methoxyethanol is used as a jet fuel additive; solvent for protective coating; and in chemical synthesis. Ethylene glycol ethers are used as solvents for resins used in the electronics industry, lacquers, paints, varnishes, gum, perfume; dyes and inks; and as a constituent of painting pastes, cleaning compounds; liquid soaps; cosmetics, nitrocellulose, and hydraulic fluids.
Erste Hilfe
If 2-Methoxyethanol gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.Medical observation is recommended for 24- 48 h afterbreathing overexposure, as pulmonary edema may bedelayed. As first aid for pulmonary edema, a doctor orauthorized paramedic may consider administering a corticosteroid spray.
Carcinogenicity
There are no experimental carcinogenicity
or cancer epidemiology data relating to this
chemical , but some short-term test data are available
and are summarized in the section on genetic and related
cellular effects.
Environmental Fate
Photolytic. Grosjean (1997) reported an atmospheric rate constant of 1.25 x 10
-11
cm
3/molecule?sec at 298 K for the reaction of methyl cellosolve and OH radicals. Based on an
atmospheric OH concentration of 1.0 x 106 molecule/cm
3, the reported half-life of methyl
cellosolve is 0.64 d (Grosjean, 1997).
Chemical/Physical. At an influent concentration of 1,000 mg/L, treatment with GAC resulted in
an effluent concentration of 342 mg/L. The adsorbability of the carbon used was 132 mg/g carbon
(Guisti et al., 1974).
Versand/Shipping
UN1188 Ethylene glycol monomethyl ether,
Hazard Class: 3; Labels: 3-Flammable liquid
l?uterung methode
Peroxides can be removed by refluxing with stannous chloride or by filtration under slight pressure through a column of activated alumina. 2-Methoxyethanol can be dried with K2CO3, CaSO4, MgSO4 or silica gel, then distilled from sodium. Aliphatic ketones (and water) can be removed by making the solvent 0.1% in 2,4-dinitrophenylhydrazine and allowing to stand overnight with silica gel before fractionally distilling. [Beilstein 1 IV 2375.]
Inkompatibilit?ten
Vapors may form explosive mixture
with air. Heat or oxidizers may cause the formation of
unstable peroxides. Attacks many metals. Strong oxidizers
may cause fire and explosions. Strong bases cause decomposition and the formation of toxic gas. Attacks some plastics, rubber and coatings. May accumulate static electrical
charges, and may cause ignition of its vapors.
Waste disposal
Concentrated waste containing no peroxides: discharge liquid at a controlled rate near
a pilot flame. Concentrated waste containing peroxides:
perforation of a container of the waste from a safe distance
followed by open burning.
2-Methoxy-ethanol Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
