Cyclopentan Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT.
PHYSIKALISCHE GEFAHREN
Die D?mpfe sind schwerer als Luft und k?nnen sich am Boden ausbreiten. Fernzündung m?glich. Flie?en, Schütten o.?. kann zu elektrostatischer Aufladung führen.
ARBEITSPLATZGRENZWERTE
TLV: 600 ppm (als TWA); (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation der D?mpfe.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann schnell eine gesundheitssch?dliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Substanz und Dampf reizen in hohen Konzentrationen die Augen und die Atemwege. Verschlucken kann zur Aufnahme in der Lunge führen; Gefahr der Aspirationspneumonie. Exposition weit oberhalb der Arbeitsplatzgrenzwerte kann zu Bewusstlosigkeit führen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Wiederholter oder andauernder Hautkontakt kann Dermatitis hervorrufen.
LECKAGE
Gefahrenbereich verlassen! Fachmann zu Rate ziehen! Belüftung. Ausgelaufene Flüssigkeit m?glichst in abdichtbaren Beh?ltern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. NICHT in die Kanalisation spülen. Pers?nliche Schutzausrüstung: Umgebungsluftunabh?ngiges Atemschutzger?t.
R-S?tze Betriebsanweisung:
R11:Leichtentzündlich.
R52/53:Sch?dlich für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.
S-S?tze Betriebsanweisung:
S9:Beh?lter an einem gut gelüfteten Ort aufbewahren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S29:Nicht in die Kanalisation gelangen lassen.
S33:Ma?nahmen gegen elektrostatische Aufladungen treffen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
Cyclopentane is a colourless flammable acyclic hydrocarbon liquid with a petrol-like smell. It is a widely used component in preparing products like analgesics, insecticides, sedatives, antitumor agents and also finds application in pharmaceutical industry.
Physikalische Eigenschaften
Colorless, mobile, flammable liquid with an odor resembling cyclohexane.
Verwenden
Cyclopentane is a petroleum product. Itis formed from high-temperature catalyticcracking of cyclohexane or by reduction ofcyclopentadiene. It occurs in petroleum etherfractions and in many commercial solvents.It is used as a solvent for paint, in extractionsof wax and fat, and in the shoe industry.
Vorbereitung Methode
Cyclopentane occurs in petroleum ether fractions and is
prepared by cracking cyclohexane in the presence of alumina
at high temperature and pressure or by reduction of cyclopentadiene.
Definition
ChEBI: A cycloalkane that consists of five carbons each bonded with two hydrogens above and below the plane. The parent of the class of cyclopentanes.
Allgemeine Beschreibung
A clear colorless liquid with a petroleum-like odor. Flash point of -35°F. Less dense than water and insoluble in water. Vapors are heavier than air.
Air & Water Reaktionen
Highly flammable. Insoluble in water.
Reaktivit?t anzeigen
CYCLOPENTANE is incompatible with strong oxidizing agents such as chlorine, bromine, fluorine. .
Health Hazard
Cyclopentane is a low-acute toxicant. Itsexposure at high concentrations may producedepression of the central nervous system withsymptoms of excitability, loss of equilibrium,stupor, and coma. Respiratory failure may occur in rats from 30–60 minutes’ exposureto 100,000–120,000 ppm in air. It is anirritant to the upper respiratory tract, skin,and eyes. No information is available inthe literature on the chronic effects fromprolonged exposure to cyclopentane.
Brandgefahr
Behavior in Fire: Containers may explode.
Chemische Reaktivit?t
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.
Sicherheitsprofil
Mildly toxic by
ingestion and inhalation. High
concentrations have narcotic action. A very
dangerous fire hazard when exposed to heat
or flame; can react with oxidizers. To fight
fire, use foam, CO2, dry chemical. When
heated to decomposition it emits acrid
smoke and fumes.
m?gliche Exposition
Cyclopentane is used as a solvent.
Environmental Fate
Biological. Cyclopentane may be oxidized by microbes to cyclopentanol, which may oxidize to
cyclopentanone (Dugan, 1972).
Photolytic. The following rate constants were reported for the reaction of octane and OH
radicals in the atmosphere: 3.7 x 10
-12 cm
3/molecule?sec at 300 K (Hendry and Kenley, 1979); 5.40
x 10
-12 cm
3/molecule?sec (Atkinson, 1979); 4.83 x 10
-12 cm
3/molecule?sec at 298 K (DeMore and
Bayes, 1999); 6.20 x 10
-12, 5.24 x 10
-12, and 4.43 x 10
-12 cm
3/molecule?sec at 298, 299, and 300 K,
respectively (Atkinson, 1985), 5.16 x 10
-12 cm
3/molecule?sec at 298 K (Atkinson, 1990), and 5.02
x 10
-12 cm
3/mol·sec at 295 K (Droege and Tilly, 1987).
Chemical/Physical. Cyclopentane will not hydrolyze because it has no hydrolyzable functional
group. Complete combustion in air yields carbon dioxide and water.
At elevated temperatures, rupture of the ring occurs forming ethylene and presumably allene
and hydrogen (Rice and Murphy, 1942).
Versand/Shipping
UN1146 Cyclopentane, Hazard Class: 3; Labels:
3-Flammable liquid.
l?uterung methode
Free it from cyclopentene by two passages through a column of carefully dried and degassed activated silica gel. It occurs in petroleum and is HIGHLY FLAMMABLE. [NMR: Christl Chem Ber 108 2781 1975, Whitesides et al. 41 2882 1976, Beilstein 5 III 10, 5 IV 4.]
Inkompatibilit?ten
May form explosive mixture with air.
May accumulate static electrical charges, and may cause
ignition of its vapors. Contact with strong oxidizers may
cause fire and explosion.
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.
Cyclopentan Upstream-Materialien And Downstream Produkte
Upstream-Materialien
2-Methylbutan
Pentan
Cyclopentanon
Cyclopentadien
4,7-Methano-1H-indene, 3a,4,5,6,7,7a-hexahydro-, (3aR,4S,7R,7aR)-rel-
trans-Cyclopentan-1,2-diol
Cyclopentanmethanol
Bicyclopentyl
Bromcyclopentylmagnesium
CIS-1,2-CYCLOPENTANEDIOL
Methylcyclopentan
Phenol
Cyclopenten
Downstream Produkte
