Butanon Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
PHYSIKALISCHE GEFAHREN
Die Dämpfe sind schwerer als Luft und können sich am Boden ausbreiten. Fernzündung möglich.
CHEMISCHE GEFAHREN
Reagiert sehr heftig mit starken Oxidationsmitteln und anorganischen Säuren unter Feuer- und Explosionsgefahr. Greift einige Kunststoffe an.
ARBEITSPLATZGRENZWERTE
TLV: 200 ppm (als TWA) 300 ppm (als STEL); BEI vorhanden; (ACGIH 2005).
MAK: 200 ppm 600 mg/m? Spitzenbegrenzung: überschreitungsfaktor I(1); Hautresorption; Schwangerschaft: Gruppe C; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann schnell eine gesundheitsschädliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Die Substanz reizt die Augen und die Atemwege. Möglich sind Auswirkungen auf das Zentralnervensystem. Exposition weit oberhalb der Arbeitsplatzgrenzwerte kann zu Bewusstlosigkeit führen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Die Flüssigkeit entfettet die Haut. Tierversuche zeigen, dass die Substanz möglicherweise fruchtbarkeitsschädigend oder entwicklungsschädigend wirken kann.
LECKAGE
Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. NICHT in die Kanalisation spülen. Persönliche Schutzausrüstung: Umgebungsluftunabhängiges Atemschutzgerät.
R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R36:Reizt die Augen.
R66:Wiederholter Kontakt kann zu spröder oder rissiger Haut führen.
R67:Dämpfe können Schläfrigkeit und Benommenheit verursachen.
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.
S-Sätze Betriebsanweisung:
S9:Behälter an einem gut gelüfteten Ort aufbewahren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
Aussehen Eigenschaften
C4H8O; Methylethylketon, Ethylmethylketon, MEK. Farblose Flüssigkeit, die nach Lösemitteln riecht.
Gefahren für Mensch und Umwelt
Reizt die Augen und die Atmungsorgane.
Nicht mit Oxidationsmitteln, Chloroform oder Alkalihydroxiden in Kontakt bringen. Gefährliche Zersetzungsprodukte sind Peroxide. Leichtentzündlich.
LD
50 (oral, Ratte): 2737 mg/kg.
Schutzmaßnahmen und Verhaltensregeln
Schutzhandschuhe als kurzzeitiger Spritzschutz.
Verhalten im Gefahrfall
Dämpfe nicht einatmen.
Mit flüssigkeitsbindendem Material, z. B. Rench Rapid aufnehmen. Der Entsorgung zuführen. Nachreinigen.
Wasser, Pulver, Schaum.
Brennbar. Dämpfe schwerer als Luft. Mit Luft Bildung explosionsfähiger Gemische möglich. Im Brandfall Entstehung gefährlicher Brandgase möglich.
Erste Hilfe
Nach Hautkontakt: Mit reichlich Wasser abwaschen.
Nach Augenkontakt: Mit reichlich Wasser bei geöffnetem Lidspalt mindestens 10 Minuten ausspülen. Augenarzt hinzuziehen.
Nach Einatmen: Frischluft.
Nach Verschlucken: Reichlich Wasser trinken lassen. Erbrechen auslösen. Arzt hinzuziehen.
Nach Kleidungskontakt: Kontaminierte Kleidung sofort ablegen.
Ersthelfer: siehe gesonderten Anschlag
Sachgerechte Entsorgung
Als halogenfreie, organische Lösemittelabfälle.
Beschreibung
2-Butanone is a stable, highly flammable chemical. It is incompatible with oxidising agents,
bases, and strong reducing agents. It is a colourless liquid with a sharp, sweet odour.
2-Butanone is produced in large quantities. It is used as a solvent and nearly half of its use
is in paints and other coatings because it will quickly evaporate into the air and it dissolves
many substances. It is also used in glues and as a cleaning agent.
Chemische Eigenschaften
Methyl ethyl ketone (MEK) is a colorless liquid with an odor that has been described as moderately sharp, fragrant, peppermint, or acetone like. It soluble in water up to 28% by weight and is miscible with many other organic solvents. The lower explosive limit is 1.4% and the upper explosive limit is 11.4%. Methyl ethyl ketone may be incompatible with strong oxidizers, amines, ammonia, inorganic acids, caustics, isocyanates, and pyridines. When used industrially, methyl ethyl ketone must be handled with caution, as it is a Class lB flammable liquid NIOSH (2010).
Physikalische Eigenschaften
2-Butanone is a clear, colorless, volatile, very flammable liquid with a sweet, mint or acetone-like odor. Odor threshold concentration is 10.0 ppmv (Leonardos et al., 1969). Experimentally determined detection and recognition odor threshold concentrations were 5.8 mg/m3 (2.0 ppmv) and 16 mg/m3 (5.4 ppmv), respectively (Hellman and Small, 1974). It is incompatible with oxidizing agents, bases, and strong reducing agents. It is a colorless liquid with a sharp, sweet odor. 2-Butanone is produced in large quantities. It is used as a solvent and nearly half of its use is in paints and other coatings because it quickly evaporates into the air and it dissolves many substances. It is also used in glues and as a cleaning agent.
Occurrence
Reported found as an impurity among products from the dry distillation of wood and in the oil (extracted with
ether) of black tea; it is also present in coffee, cheese, bread, some citrus oils and some other natural products (grape, raspberry).
Verwenden
2-Butanone is an eye irritant that has been used as a water soluble photoinitiator for the photopolymerization of methacrylic acid (MAA). As solvent; in the surface coating industry; manufacture of smokeless powder; colorless synthetic resins.
synthetische
By catalytic dehydrogenation of secondary butyl alcohol; by dehydration of butane-2,3-diol by refluxing with 25% aqueous
H2SO4. Industrially, it is also prepared by controlled oxidation of butane, by dry distillation of calcium acetate and calcium
propionate, or by refluxing methyl acetoacetate and diluted H2SO4.
Definition
ChEBI: A dialkyl ketone that is a four-carbon ketone carrying a single keto- group at position C-2.
Vorbereitung Methode
Methyl ethyl ketone is commercially manufactured from nbutene
in a metal-catalyzed hydrogenation reaction that
proceeds through the intermediate formation of 2-butanol
. A second method of synthesis involves the liquid-
phase oxidation of n-butane with the formation of acetic
acid as a coproduct.
Allgemeine Beschreibung
Methyl ethyl ketone (MEK) is a colourless liquid with a sweet and sharp odour. It is soluble in alcohol, ether, acetone benzene, and water. It is a solvent often found in mixtures with acetone, ethyl acetate, n-hexane, toluene, or alcohols. It has applications in the surface coating industry and in the de-waxing of lubricating oils. MEK is used in the manufacture of colourless synthetic resins, artificial leather, rubbers, lacquers, varnishes, and glues.
Air & Water Reaktionen
Highly flammable. Slightly soluble in water.
Hazard
Flammable, dangerous fire risk. Toxic by
ingestion.
Health Hazard
Occupational workers are exposed to 2-butanone by breathing contaminated air in workplaces associated with the production or use of paints, glues, coatings, or cleaning agents. Prolonged exposures to 2-butanone cause symptoms of poisoning such as cough, dizziness, drowsiness, headache, nausea, vomiting, dermatitis, irritation of the nose, throat, skin, and eyes and at very high levels cause drooping eyelids, uncoordinated muscle movements, loss of consciousness, and birth defects. Chronic inhalation studies in animals have reported slight neurological, liver, kidney, and respiratory effects. However, information on the chronic (long-term) effects of 2-butanone (methyl ethyl ketone) in humans is limited.
Brandgefahr
Flammable/combustible material. May be 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.
Flammability and Explosibility
Methyl ethyl ketone is extremely flammable (NFPA rating = 3), and its vapor can
travel a considerable distance to an ignition source and "flash back." MEK vapor
forms explosive mixtures with air at concentrations of 1.9 to 11% (by volume).
Carbon dioxide or dry chemical extinguishers should be used for MEK fires.
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.
mögliche Exposition
MEK is used as a solvent in nitrocellulose coating and vinyl film manufacture; in smokeless
powder manufacture; in cements and adhesives and in the
dewaxing of lubricating oils. It is also an intermediate in
drug manufacture
Carcinogenicity
Although MEK has not been specifically
examined in a rodent 2-year bioassay, there is little to
suggest that the material is carcinogenic. When used as a
delivery vehicle in a dermal carcinogenicity bioassay for
organic sulfur compounds, Horton et al. found that the
application of benzyl disulfide or phenylbenzylthiophene
in a 25–29% solution of MEK in dodecylbenzene together
failed to increase the incidence of benign skin papillomas in
male C3H/HeJmice. The mice used in the experiments
were treated twice a week for 52 weeks with the MEKcontaining
test solution.
Lager
2-Butanone should be protected from moisture.
Versand/Shipping
UN1193 Methyl ethyl ketone or Ethyl methyl
ketone, Hazard Class: 3; Labels: 3-Flammable liquid.
Inkompatibilitäten
May form explosive mixture with air.
Violent reaction with strong oxidizers, amines, ammonia,
inorganic acids; caustics, isocyanates, pyridines. Incompatible with potassium tert-butoxide, 2-propanol,
chlorosulfonic acid; oleum. Attacks some plastics. Ketones
are incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep
away from alkaline materials, strong bases, strong acids,
oxoacids, epoxides, nitrated amines, azo, diazo, azido compounds, carbamates, organic cyanates
Waste disposal
Consult with environmental
regulatory agencies for guidance on acceptable disposal
practices. Generators of waste containing this contaminant
(≥100 kg/mo) must conform to EPA regulations governing
storage, transportation, treatment, and waste disposal.
Incineration
Vorsichtsmaßnahmen
2-Butanone vapor and air mixtures are explosive. It reacts violently with strong oxidants
and inorganic acids causing fi re and explosion hazard.
Butanon Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
2-(2-(4-((2-Chlorethyl)methyl-amino)phenyl)vinyl)-1,3,3-trimethyl-3H-indoliumchlorid
TERT-BUTYL 4-(HYDROXYMETHYL)PYRIDIN-2-YLCARBAMATE
DL-allo-Isoleucin
3',4'-(DIOCTYLOXY)BENZALDEHYDE
Saquinavir
Alizaprid
2-IODO-ISONICOTINIC ACID
2,3-Butandionmonoxim
Ethyl-2-amino-4,5-dimethyl3-thenoat
5,6-DIMETHYLTHIENO[2,3-D]PYRIMIDIN-4(3H)-ONE
Benomyl
4-CHLORO-5,6-DIMETHYLTHIENO[2,3-D]PYRIMIDINE
2-AMINO-4,5-DIMETHYL-THIOPHENE-3-CARBONITRILE
Butandiondioxim
3-Methyl-1-pentin-3-ol
SEC-BUTYLAMINE
2-Benzofurancarboxylic acid ethyl ester
5-METHOXYBENZOFURAN-2-BORONIC ACID
Bis[(aminooxy)essig]surehydrochlorid
Industrial gear oil,weight load
Industrial gear oil,middle load
optical diskbase material modified PMMA copolymer
1-(3-AMINO-BENZOFURAN-2-YL)-ETHANONE
TERT-BUTYL 4-(AMINOMETHYL)PYRIDIN-2-YLCARBAMATE
(2-TERT-BUTOXYFORMAMIDO-PYRIDIN-4-YL)METHYL METHANESULFONATE
Pentan-2,3-dion
Benzofuran-2-carbonsure
2-Butanon-peroxid
(5,6-DIMETHYL-THIENO[2,3-D]PYRIMIDIN-4-YL)-HYDRAZINE
3-Methylbenzofuran-2-carboxylic acid
3-AMINO-5,6-DIMETHYL-3H-THIENO[2,3-D]PYRIMIDIN-4-ONE
Sec-Butylamin
Industrial gear oil
Mivacurium chloride
2-(AMINOCARBONYL)NICOTINIC ACID
Coumaphos (ISO)
2-PHENOXYACETAMIDINE HYDROCHLORIDE
O-(2,4-Dichlorophenyl)-O-ethyl-S-propyldithiophosphat
β,ε-Carotin-3,3'-diol
2,3-Dimethyl-1H-indol
