Furan

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Achtung

• Gefahrenhinweise

  H224：Flüssigkeit und Dampf extrem entzündbar.

  H315：Verursacht Hautreizungen.

  H341：Kann vermutlich genetische Defekte verursachen.

  H350：Kann Krebs verursachen.

  H373：Kann die Organe schädigen bei längerer oder wiederholter Exposition.

  H412：Schädlich für Wasserorganismen, mit langfristiger Wirkung.

• Sicherheit

  P210：Von Hitze, heißen Oberflächen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen.

  P233：Behälter dicht verschlossen halten.

  P273：Freisetzung in die Umwelt vermeiden.

  P308+P313：BEI Exposition oder falls betroffen: Ärztlichen Rat einholen/ärztliche Hilfe hinzuziehen.

  P403+P233：An einem gut belüfteten Ort aufbewahren. Behälter dicht verschlossen halten.

Furan Chemische Eigenschaften,Einsatz,Produktion Methoden

• ERSCHEINUNGSBILD

  KLARE FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH. VERFäRBT SICH BRAUN BEIM STEHENLASSEN.

• PHYSIKALISCHE GEFAHREN

  Die Dämpfe sind schwerer als Luft und können sich am Boden ausbreiten. Fernzündung möglich.

• CHEMISCHE GEFAHREN

  Bildung explosionsfähiger Peroxide bei Kontakt mit Luft. Reagiert sehr heftig mit Oxidationsmitteln und Säuren unter Feuer- und Explosionsgefahr. Feuergefahr bei Exposition gegenüber Hitze oder Flammen.

• ARBEITSPLATZGRENZWERTE

  TLV nicht festgelegt.
  MAK: Hautresorption; Krebserzeugend Kategorie 2 (DFG 2008).
  

• AUFNAHMEWEGE

  Aufnahme in den Körper durch Inhalation der Dämpfe, durch Inhalation des Aerosols und über die Haut.

• INHALATIONSGEFAHREN

  Beim Verdampfen bei 20°C kann sehr schnell eine gesundheitsschädliche Kontamination der Luft eintreten.

• WIRKUNGEN BEI KURZZEITEXPOSITION

  WIRKUNGEN BEI KURZZEITEXPOSITION:
  Der Dampf reizt die Atemwege. Inhalation des Dampfes kann zu Lungenödem führen (s.Anm.).

• LECKAGE

  Belüftung. Ausgelaufene Flüssigkeit 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:

  R45:Kann Krebs erzeugen.
  R12:Hochentzündlich.
  R19:Kann explosionsfähige Peroxide bilden.
  R20/22:Gesundheitsschädlich beim Einatmen und Verschlucken.
  R38:Reizt die Haut.
  R48/22:Gesundheitsschädlich: Gefahr ernster Gesundheitsschäden bei längerer Exposition durch Verschlucken.
  R52/53:Schädlich für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
  R68:Irreversibler Schaden möglich.

• S-Sätze Betriebsanweisung:

  S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
  S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
  S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.

• Aussehen Eigenschaften

  C4H4O; Furfuran. Farblose Flüssigkeit mit stechendem, etherischem Geruch.

• Gefahren für Mensch und Umwelt

  Hochentzündliche Flüssigkeit. Kann mit Luft explosionsfähige Peroxide bilden.
  Gesundheitsschädlich beim Einatmen. Reizt die Augen, Atmungsorgane und die Haut. Kann Krebs erzeugen
  Nicht mit Säuren in Berührung bringen.

• 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.
  Kohlendioxid, Pulver, Schaum.
  Brennbar. Dämpfe schwerer als Luft. Mit Luft Bildung explosionsfähiger Gemische.

• 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: Viel Wasser trinken lassen, Erbrechen auslösen. Arzt hinzuziehen.
  Nach Kleidungskontakt: Kontaminierte Kleidung sofort entfernen.
  Ersthelfer: siehe gesonderten Anschlag

• Sachgerechte Entsorgung

  Als halogenfreie, organische Lösemittelabfälle.

• Beschreibung

  Furan occurs naturally in oils distilled from rosin containing pinewood. In addition, many natural foods contain the furan ring structure and substituted furans may be formed through cooking of simple carbohydrates. Furan is also found in tobacco smoke as well as wood smoke and gas emissions from gasoline and diesel engines. Furan has also been detected in industrial effluents and can be emitted to the air from petroleum refineries and coal-mining and gasification plants.

• Chemische Eigenschaften

  Furan is a colorless liquid; turns brown on standing. Strong ethereal odor.

• Chemische Eigenschaften

  Furan is a cyclic dienic ether stabilized by benzene-like resonance. Because of its conjugated unsaturation and heterocyclic atom, furan will undergo many types of reactions. It is, therefore, of interest as a chemical intermediate for pharmaceuticals, insecticides and fine chemicals. The heterocyclic oxygen atom in a ring with conjugated unsaturation gives furan a combination of ether, aromatic and olefinic characteristics. This polyfunctionality permits it to undergo a variety of reactions. Compared to benzene, the furan ring has greater reactivity, and is more susceptible to cleavage, thus resembling the vinyl ethers. Like the vinyl ethers, the furan ring is cleaved by aqueous acids. This reaction is accompanied by resinification .

• Verwenden

  Furan is a five-membered heterocyclic aromatic ring. Furan is used as a building block for the preparation of many heterocyclic compounds.

• Verwenden

  In organic syntheses. Furan is occasionally used in the composing of artificial essential oils. It finds a little - rare - use in industrial fragrances for certain masking purposes, e. g. when the problem is: to mask very volatile, undesirable odors. It is used in special fragrances such as “smokey” odors for certain products, directly or indirectly connected with food products.

• Verwenden

  Furan is a valuable chemical intermediate for pharmaceuticals, insecticides, and other organic compounds. The furan ring is cleaved by aqueous acid which can lead to polymer formation.

• Verwenden

  Furan is used as an intermediate in organicsynthesis.

• Definition

  furan: A colourless liquid compound,C₄H₄O; r.d. 0.94; m.p. –86°C;b.p. 31.4°C. It has a five-memberedring consisting of four CH₂ groupsand one oxygen atom.

• Definition

  A heterocyclic liquid organic compound. Its five-membered ring contains four carbon atoms and one oxygen atom. The structure is characteristic of some monosaccharide sugars (furanoses).

• synthetische

  By decarboxylation of Furoic acid. Furan can also be prepared directly from Furfural.

• Definition

  A heterocyclic compound.

• Allgemeine Beschreibung

  Furan is a stable, colourless chemical liquid. It is highly flammable and forms explosive mixtures with air. It is incompatible with many other chemical substances, for example, strong oxidising agents, acids, peroxides, and oxygen. Furan is produced commercially by decarbonylation of furfural. It is used mainly in the production of tetrahydrofuran, thiophene, and pyrrole. It also occurs naturally in certain woods and during the combustion of coal and is found in engine exhausts, wood smoke, and tobacco smoke.

• Air & Water Reaktionen

  Highly flammable. When uninhibited, Furan forms explosive peroxides on exposure to air. Insoluble in water.

• Reaktivität anzeigen

  Furan is sensitive to heat and may turn brown upon standing. Furan may be light sensitive. When uninhibited, Furan forms explosive peroxides on exposure to air. Furan may react with oxidizers, acids, peroxides and oxygen. Furan resinifies on evaporation or when in contact with mineral acids, but Furan is stable in alkalis. .

• Hazard

  Flammable, dangerous fire risk, flammable limits 2–24%, forms peroxides on exposure to air. Absorbed by skin. Possible carcinogen.

• Health Hazard

  Furan is a highly toxic compound. Inhalationof its vapors can cause acute pulmonaryedema and lung damage. The intraperitonealLD50 value in rodents is between 5 and7 mg/kg. The inhalation LC50 value in micefor a 1-hour exposure is 120 mg/m³.

• Health Hazard

  The vapors are narcotic. Acute exposure to Furan by inhalation may involve both reversible and irreversible changes. Acute exposure by ingestion or skin absorption, as well as chronic exposure, are associated with high toxicity.

• Brandgefahr

  Very dangerous, upon exposure to heat or flame. Furan may form unstable peroxides on exposure to air. Contact with acids can initiate a violent, heat producing reaction. Avoid acids, oxidizing agents. Upon standing in air, Furan may form unstable peroxides.

• Flammability and Explosibility

  Extremely flammable

• Sicherheitsprofil

  Confirmed carcinogen. Poison by inhalation and intraperitoneal routes. Moderately toxic by ingestion and skin contact. Experimental reproductive effects. A narcotic. Mutation data reported. The exposure concentration limit of 10 ppm together with its low boiling point requires that adequate ventilation be provided in areas where ths chemical is handled. Contact with liquid must be avoided since this chemical can be absorbed through the skin. Washing thoroughly with soap and water followed by prolonged rinsing should be done immedlatelp after accidental contact. A very dangerous fire hazard when exposed to heat or flame; can react with oxidzing materials. Unstabdized, it may form unstable peroxides on exposure to air and should always be tested before ddlation. Washing with an aqueous solution of ferrous sulfate slightly acidified with sodum bisulfate will remove these peroxides. Confirm by test. Contact with acids can initiate a violent exothermic reaction. Moderate explosion hazard when exposed to flame. Furan's low bohg point makes it easy to obtain explosive concentrations of the vapor in inadequately ventilated areas. To fight fire, use CO2, dr). chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also PEROXIDES.

• mögliche Exposition

  Furan is used as a chemical intermedi ate in the production of herbicides and pharmaceuticals; for making tetrahydrofuran; in formation of lacquers; as a sol vent for resins in organic synthesis, especially for pyrrole, thiophene.

• Erste Hilfe

  If this chemical 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

  Furan is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals.

• Environmental Fate

  Furan may be released to the environment as a waste industrial product or from unintentional or accidental releases. If released to soil, it is expected to volatilize. If released to water, furan is not expected to adsorb to suspended particles and sediment and is likely to volatilize to ambient air. Sulfate-reducing bacteria can degrade furan. However, under nonsulfate-reducing conditions, biodegradation in soil and water is expected to be slow. In the air, furan will exist as a vapor and will be subject to degradation by reacting with hydroxyl radicals.

• Lager

  Color Code—Red: Flammability Hazard: Store ina flammable liquid storage area or approved cabinet awayfrom ignition sources and corrosive and reactive materials.Prior to working with this chemical you should be trainedon its proper handling and storage. Before entering confinedspace where this chemical may be present, check to makesure that an explosive concentration does not exist. Store inan explosion-proof refrigerator. Keep in a tightly closedcontainer under an inert atmosphere and protect from lightfor long-term storage. A regulated, marked area should beestablished where this chemical is handled, used, or storedin compliance with OSHA Standard 1910.1045.

• Versand/Shipping

  UN2389 Furan, Hazard Class: 3; Labels: 3-Flammable liquid.

• läuterung methode

  Shake it with aqueous 5% KOH, dry it with CaSO4 or Na2SO4, then distil it under nitrogen, from KOH or sodium, immediately before use. A trace of hydroquinone could be added as an inhibitor of oxidation. [Beilstein 17 H 27, 17 I 16, 17 II 34, 17/1 V 291.]

• Toxicity evaluation

  Furan can cause eye, skin, and mucus membrane irritation, burning sensation and, in severe cases, corrosion. If inhaled, furan may produce pulmonary edema and bronchiolar necrosis. When absorbed, furan can cause central nervous system (CNS) depression to the point of narcosis and tonic seizures.
  Furan is metabolized by the cytochrome P450 enzymes in the liver and other tissues. Furan is metabolized to cis-2- butene-1,4-dial. This active metabolite is acutely toxic to liver cells. The furan ring undergoes oxidative cleavage and forms highly reactive furan radical cations or epoxides, which react directly with cellular nucleophiles. These reactive metabolites may react directly with deoxyribonucleic acid (DNA) or with cellular proteins to produce disruption of cellular functions and cell death. Chronic cell death and regeneration produced by chronic furan exposure may be a significant factor in the carcinogenicity potential of the chemical. In addition, there is some evidence to suggest that the reactive metabolites of furan may induce mutations in cellular genes.

• Inkompatibilitäten

  May form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong acids, amines, strong bases, reducing agents. Unless stabilized with an inhibitor, air exposure forms unstable peroxides.

• Filter für giftige stoffe

  The initial threshold screening level (ITSL) for furan is 4 μg/m3 based on an annual averaging time.

• Waste disposal

  Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations govern ing storage, transportation, treatment, and waste disposal.

Furan Upstream-Materialien And Downstream Produkte

Furan Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(251)Suppliers

110-00-9, Furan Verwandte Suche: