Cyclopentadien

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Achtung

• Gefahrenhinweise

  H226：Flüssigkeit und Dampf entzündbar.

  H301：Giftig bei Verschlucken.

  H312：Gesundheitsschädlich bei Hautkontakt.

  H315：Verursacht Hautreizungen.

  H319：Verursacht schwere Augenreizung.

  H332：Gesundheitsschädlich bei Einatmen.

  H335：Kann die Atemwege reizen.

• Sicherheit

  P261：Einatmen von Staub vermeiden.

  P264：Nach Gebrauch gründlich waschen.

  P264：Nach Gebrauch gründlich waschen.

  P270：Bei Gebrauch nicht essen, trinken oder rauchen.

  P271：Nur im Freien oder in gut belüfteten Räumen verwenden.

  P280：Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.

  P301+P310：BEI VERSCHLUCKEN: Sofort GIFTINFORMATIONSZENTRUM/Arzt/... (geeignete Stelle für medizinische Notfallversorgung vom Hersteller/Lieferanten anzugeben) anrufen.

  P302+P352：BEI BERÜHRUNG MIT DER HAUT: Mit viel Wasser/... (Hersteller kann, falls zweckmäßig, ein Reinigungsmittel angeben oder, wenn Wasser eindeutig ungeeignet ist, ein alternatives Mittel empfehlen) waschen.

  P304+P340：BEI EINATMEN: Die Person an die frische Luft bringen und für ungehinderte Atmung sorgen.

  P305+P351+P338：BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.

  P312：Bei Unwohlsein GIFTINFORMATIONSZENTRUM/Arzt/... (geeignete Stelle für medizinische Notfallversorgung vom Hersteller/Lieferanten anzugeben) anrufen.

  P321：Besondere Behandlung

  P322：Gezielte Maßnahmen

  P330：Mund ausspülen.

  P332+P313：Bei Hautreizung: Ärztlichen Rat einholen/ärztliche Hilfe hinzuziehen.

  P362：Kontaminierte Kleidung ausziehen und vor erneutem Tragen waschen.

  P363：Kontaminierte Kleidung vor erneutem Tragen waschen.

  P405：Unter Verschluss aufbewahren.

  P501：Inhalt/Behälter ... (Entsorgungsvorschriften vom Hersteller anzugeben) zuführen.

1,3-Cyclopentadiene Chemische Eigenschaften,Einsatz,Produktion Methoden

• ERSCHEINUNGSBILD

  FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.

• PHYSIKALISCHE GEFAHREN

  Die Dämpfe sind schwerer als Luft.

• CHEMISCHE GEFAHREN

  Leichte Bildung explosionsfähiger Peroxide bei Kontakt mit Luft. Polymerisiert leicht zum Dimer unter Feuer- und Explosionsgefahr. Die Reaktion wird beschleunigt durch Peroxide oder Trichloressigsäure. Reagiert sehr heftig mit Kaliumhydroxid. Reagiert sehr heftig mit starken Oxidationsmitteln und starken Säuren wie Rauchender Salpetersäure und Schwefelsäureunter Feuer- und Explosionsgefahr.

• ARBEITSPLATZGRENZWERTE

  TLV: 75 ppm (als TWA); (ACGIH 2005).
  MAK: IIb (nicht festgelegt, aber Informationen vorhanden) (DFG 2008).
  

• AUFNAHMEWEGE

  Aufnahme in den Körper durch Inhalation.

• 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.

• LECKAGE

  Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. Persönliche Schutzausrüstung: Umgebungsluftunabhängiges Atemschutzgerät.

• Beschreibung

  Cyclopentadiene is a flammable, colorless liquid with a sweet odor, like turpentine. Molecularweight=66.10; Specific gravity (H2O:1): 0.8; Boilingpoint=42.℃; Freezing/Melting point=285℃; Vaporpressure=400 mmHg at 20℃; Flash point=25℃ (oc);Autoignition temperature=640℃. Insoluble in water.

• Chemische Eigenschaften

  Cyclopentadiene is a flammable, colorless liq- uid with a sweet odor, like turpentine.

• Chemische Eigenschaften

  colourless liquid

• Chemische Eigenschaften

  1,3-Cyclopentadiene is a colorless liquid that dimerizes easily in the presence of peroxides and trichloroacetic acid to a colorless solid.

• Physikalische Eigenschaften

  Colorless liquid with a turpentine-like odor. Odor threshold concentration is 1.9 ppm (quoted, Amoore and Hautala, 1983).

• Verwenden

  In manufacture of resins; in organic synthesis

• Verwenden

  Cyclopentadiene is used in the manufactureof resins, in the synthesis of sesquiterpenesand camphors, and as a ligand in the preparationof metal complexes.

• Verwenden

  manufacture of resins; in organic synthesis as the diene in the Diels-Alder reaction producing sesquiterpenes, synthetic alkaloids, camphors.

• Definition

  A cyclic hydrocarbon made by cracking petroleum. The molecules have a five-membered ring containing two carbon- carbon double bonds and one CH₂ group. It forms the negative cyclopentadienyl ionC₅H₅^-, present in sandwich compounds, such as ferrocene.

• Vorbereitung Methode

  This compound occurs in the C6–C8 petroleum distillation fraction, and in coke oven light oil fractions. It is produced by dehydrogenation of cyclopentadiene or monomerization of its dimer.

• Definition

  cyclopentadiene: A colourless liquidcyclic alkene,C₅H₆; r.d. 0.8021;m.p. –97.2°C; b.p. 40.0°C. It is preparedas a by-product during the fractionaldistillation of crude benzenefrom coal tar. It undergoes condensationreactions with ketones to givehighly coloured compounds (fulvenes)and readily undergoes polymerizationat room temperature togive the dimer, dicyclopentadiene.Cyclopentadiene itself is not an aromaticcompound because it does nothave the required number of pi electrons.However, removal of a hydrogenatom produces the stablecyclopentadienyl ion,C₅H_5-, whichdoes have aromatic properties. Inparticular, the ring can coordinate topositive ions in such compounds asferrocene.

• Allgemeine Beschreibung

  1，3-Cyclopentadiene is a colorless liquid with an irritating, terpene-like odor. Bp: 42.5°C; Flash point: 77°F. Density: 0.805 g cm-3.

• Reaktivität anzeigen

  1，3-Cyclopentadiene is incompatible with strong oxidizing agents. Ignites on contact with oxygen (O2) and ozone (O3). Explodes on contact with fuming nitric acid or a mixture of sulfuric acid and nitrogen tetroxide. Reacts vigorously on contact with potassium hydroxide and other strong bases. Mixtures with air are explosive. Presents a moderate explosion hazard when exposed to heat or flame. Decomposes violently at high temperature and pressure. May form explosive peroxides in storage. Undergoes a spontaneous dimerization at room temperature to give DI1，3-Cyclopentadiene (C10H12, CAS No: 77-73-6), which is a low-melting solid (melting point: 32.5°C). The reaction is strongly exothermic (Hazardous Chemicals Desk Reference, p. 360 (1987)), but occurs sufficiently slowly that 1，3-Cyclopentadiene can be said to be stable at room temperature. The dimerization accounts for the partial or complete solidification of liquid 1，3-Cyclopentadiene in storage. Polymerization occurs more rapidly and extensively at higher temperatures. When heated to 180-200°C, 1，3-Cyclopentadiene gives poly1，3-Cyclopentadiene, a white waxy solid. Stronger heating breaks down poly1，3-Cyclopentadiene and re-generates the monomeric 1，3-Cyclopentadiene as a vapor. The vapor decomposes violently at higher temperatures and pressures.

• Health Hazard

  Cyclopentadiene exhibited low toxicity inanimals. Inhalation produced irritation of theeyes and nose. A 3-mL amount injected subcutaneouslyinto rabbits resulted in narcosis,convulsions, and death (von Oettingen 1940).A dose of≤ 1 mL was nontoxic. Repeatedexposure to 500 ppm caused liver and kidneyinjuries in rats; but longer repeated exposuresto 250 ppm produced no such effects in testanimals (ACGIH 1986). An oral LD50 valuein rats for the dimeric form has been recordedas 820 mg/kg (Smyth 1954).

• Brandgefahr

  Flammable liquid; flash point (open cup) 32°C (90°F); fire- extinguishing agent: dry chemical, foam, or CO2; a water spray may be used to cool the surroundings. Prolonged exposure to air may cause peroxide formation.

• Sicherheitsprofil

  Low toxicity by ingestion. A dangerous fire hazard when exposed to heat or flame; can react with oxidizing materials. Moderate explosion hazard in the form of gas when exposed to heat or by chemical reaction. It decomposes violently at hgh temperatures and pressures. dimerization is highly exothermic. Explosive reaction with fuming nitric acid,dinitrogen tetroxide, sulfuric acid. Reaction with nitrogen oxide + oxygen forms an explosive product. Reaction with oxygen forms a flame-sensitive explosive product. Ignites on contact with oxygen + ozone. Reacts vigorously on contact with potassium hydroxide. Incompatible with oxides of nitrogen, sulfuric acid. When heated to decomposition it emits acrid smoke and fumes.

• mögliche Exposition

  Cyclopentadiene is used as an inter- mediate in the manufacture of resins, insecticides, fungi- cides, and other chemicals.

• 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. Do NOT induce vomiting.

• Environmental Fate

  Biological. Cyclopentadiene may be oxidized by microbes to cyclopentanone (Dugan, 1972).
  Chemical/Physical. Dimerizes to dicyclopentadiene on standing (Windholz et al., 1983).

• Lager

  Color Code—Red: Flammability Hazard: Store ina flammable liquid storage area or approved cabinet awayfrom ignition sources and corrosive and reactive materials.May form peroxides in storage. Prior to working withcyclopentadiene you should be trained on its proper handling and storage. Cyclopentadiene must be stored to avoidcontact with strong oxidizing agents because violent reactions occur. Cyclopentadiene must be stored at temperaturesbelow 0℃ or it may undergo an explosive chemical reaction. Sources of ignition, such as smoking and open flames,are prohibited where cyclopentadiene is used, handled, orstored in a manner that could create a potential fire orexplosion hazard. Metal containers involving the transfer ofthis chemical should be grounded and bonded. Where possible, automatically pump liquid from drums or other storagecontainers to process containers. Drums must be equippedwith self-closing valves, pressure vacuum bungs, and flamearresters. Use only nonsparking tools and equipment, especially when opening and closing containers of this chemical. Sources of ignition, such as smoking and open flames,are prohibited where this chemical is used, handled, orstored in a manner that could create a potential fire orexplosion hazard. Wherever this chemical is used, handled,manufactured, or stored, use explosion-proof electricalequipment and fittings.

• Versand/Shipping

  UN1993 Flammable liquids, n.o.s., Hazard Class: 3; Labels: 3-Flammable liquid, Technical Name Required.

• läuterung methode

  Dry the diene with Mg(ClO4)2 and distil it rapidly as it dimerises readily at room temperature. It should be used immediately or stored in a Dry Ice or an ice-salt bath. HIGHLY FLAMMABLE. [Moffett Org Synth Coll Vol IV 238 1963.] Cyclopentadiene Dimer (4,7-methano-3a,4,7,7a-tetrahydroindene) has [77-73-6], M 132.3, m 33o, b 170o/atm, and d2 5 0.986; add ~0.05% of 2,6-di-tert-butyl-4-methylphenol as stabilizer. Cyclopentadiene is prepared when required by de-polymerising the technical grade dimer by heating it carefully under a fractionating column [Wilkinson Org Synth Coll Vol IV 467 1963], as described by Moffett (above reference), or by adding the dimer at a steady rate onto mineral oil heated at 240-270o (Korach et al. Org Synth 42 50 1962). [Beilstein 5 II 391.]

• Inkompatibilitäten

  Vapors may form explosive mixture with air. Converted (dimerized) to higher-boiling dicyclopenta- diene upon standing in air and @ 32 F/0 C; this conversion may be violent and exothermic; this reaction is accelerated by peroxides or trichloroacetic acid. Reacts violently with potassium hydroxide. Violent reaction with strong oxidi- zers; strong acids; dinitrogen tetroxide; magnesium. 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, oxoa- cids, epoxides, alkaline earth metals, nitrogen oxides. May accumulate static electrical charges, and may cause ignition of its vapors.

• Waste disposal

  Dissolve or mix the material with a combustible solvent and burn in a chemical incinera- tor equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

1,3-Cyclopentadiene Upstream-Materialien And Downstream Produkte

Cyclopentadien Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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