Cyclopenten

Cyclopentene Struktur
142-29-0
CAS-Nr.
142-29-0
Bezeichnung:
Cyclopenten
Englisch Name:
Cyclopentene
Synonyma:
Cyclopenten;opentene;Cyclopcnten;Cyclopentene;1-Cyclopentene;Cyclopentene >Cyclopentene, 98+%;Cyclopentene, tech.;CYCLOPENTENE, STAB.;Cyclopentene, tech., ≥95%
CBNumber:
CB7231452
Summenformel:
C5H8
Molgewicht:
68.12
MOL-Datei:
142-29-0.mol

Cyclopenten Eigenschaften

Schmelzpunkt:
−135 °C(lit.)
Siedepunkt:
44-46 °C(lit.)
Dichte
0.771 g/mL at 25 °C(lit.)
Dampfdruck
20.89 psi ( 55 °C)
Brechungsindex
n20/D 1.421(lit.)
Flammpunkt:
<−30 °F
storage temp. 
0-6°C
Löslichkeit
water: soluble0.535g/L at 25°C
Aggregatzustand
Liquid
Wichte
0.771
Farbe
Colorless
Wasserlöslichkeit
immiscible
Sensitive 
Air Sensitive
BRN 
635707
Henry's Law Constant
6.3 x 10-2 atm?m3/mol at 25 °C (Hine and Mookerjee, 1975)
Stabilität:
Stable. Highly flammable. Incompatible with strong oxidizing agents. Store cold.
InChIKey
LPIQUOYDBNQMRZ-UHFFFAOYSA-N
LogP
2.47 at 25℃
CAS Datenbank
142-29-0(CAS DataBase Reference)
NIST chemische Informationen
Cyclopentene(142-29-0)
EPA chemische Informationen
Cyclopentene (142-29-0)
Sicherheit
  • Risiko- und Sicherheitserklärung
  • Gefahreninformationscode (GHS)
Kennzeichnung gefährlicher F,Xn
R-Sätze: 11-21/22-36/37/38-65-67-52/53-38
S-Sätze: 9-16-26-33-36-62-61-36/37
RIDADR  UN 2246 3/PG 2
WGK Germany  3
RTECS-Nr. GY5950000
10-23
Selbstentzündungstemperatur 743 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29021990
Toxizität Acute oral LD50 for rats is 1,656 mg/kg (quoted, RTECS, 1985).
Bildanzeige (GHS) GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H225 Flüssigkeit und Dampf leicht entzündbar. Entzündbare Flüssigkeiten Kategorie 2 Achtung P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H304 Kann bei Verschlucken und Eindringen in die Atemwege tödlich sein. Aspirationsgefahr Kategorie 1 Achtung
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung P264, P280, P302+P352, P321,P332+P313, P362
Sicherheit
P210 Von Hitze, heißen Oberflächen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen.
P233 Behälter dicht verschlossen halten.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P301+P310 BEI VERSCHLUCKEN: Sofort GIFTINFORMATIONSZENTRUM/Arzt/... (geeignete Stelle für medizinische Notfallversorgung vom Hersteller/Lieferanten anzugeben) anrufen.
P303+P361+P353 BEI BERÜHRUNG MIT DER HAUT (oder dem Haar): Alle kontaminierten Kleidungsstücke sofort ausziehen. Haut mit Wasser abwaschen oder duschen.
P331 KEIN Erbrechen herbeiführen.

Cyclopenten Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:

R11:Leichtentzündlich.
R21/22:Gesundheitsschädlich bei Berührung mit der Haut und beim Verschlucken.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R65:Gesundheitsschädlich: kann beim Verschlucken Lungenschäden verursachen.
R67:Dämpfe können Schläfrigkeit und Benommenheit verursachen.
R52/53:Schädlich für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.

S-Sätze Betriebsanweisung:

S9:Behälter an einem gut gelüfteten Ort aufbewahren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S62:Bei Verschlucken kein Erbrechen herbeiführen. Sofort ärztlichen Rat einholen und Verpackung oder dieses Etikett vorzeigen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.

Chemische Eigenschaften

Cyclopentene is a highly flammable liquid with a low flash point. It reacts readily with oxidizing agents.

Physikalische Eigenschaften

Clear, colorless, watery, very flammable liquid with a characteristic sweet, petroleum-like odor.

Verwenden

Cyclopentene is a cycloalkene that is cyclopentane having one endocyclic double bond. Vapors heavier than air. Inhalation of high concentrations may be narcotic. Used to make rubber and plastics. Neopentyl phosphine ligand catalyzed Heck coupling of cyclopentene has been reported. Mechanism of reaction of ground state oxygen atom with cyclopentene has been investigated. Homopolymerization of cyclopentene has been reported. Photocatalytic oxidation of cyclopentene over various titanium(IV) oxide catalyst has been reported. Cyclopentene was used to investigate the [2+2] cycloaddition of diamond (001) surfaces with alkene.

Definition

ChEBI: Cyclopentene is a cycloalkene that is cyclopentane having one endocyclic double bond.

synthetische

Cyclopentene is synthesized by selective hydrogenation of cyclopentadiene or by dehydration of cyclopentanol. It is produced industrially in large amounts by steam cracking of naphtha. Cyclopentene is present in coal tar, cigarette smoke, and automobile emissions.

Allgemeine Beschreibung

Cyclopentene appears as a colorless liquid. Less dense than water and insoluble in water. Flash point below 0°F. Vapors heavier than air. Inhalation of high concentrations may be narcotic. Used to make rubber and plastics.

Air & Water Reaktionen

Highly flammable. Insoluble in water.

Reaktivität anzeigen

Cyclopentene may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions.

Health Hazard

May be harmful by inhalation, ingestion, or skin absorption. May cause eye and skin irritation.

Brandgefahr

Special Hazards of Combustion Products: Vapor may travel considerable distance to a source of ignition and flashback. Explosion may occur under fire condition.

Sicherheitsprofil

Moderately toxic by ingestion and skin contact. A very dangerous fire hazard when exposed to flame or heat; can react with oxidning materials. Keep away from heat and open flame. To fight fire, use foam, CO2, dry chemical.

Environmental Fate

Biological. Cyclopentene 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 cyclopentene with OH radicals in the atmosphere: 6.39 x 10-11 cm3/molecule?sec (Atkinson et al., 1983), 4.99 x 10-11 cm3/molecule?sec at 298 K (Rogers, 1989), 4.0 x 10-10 cm3/molecule?sec (Atkinson, 1990) and 6.70 x 10-11 cm3/molecule?sec (Sablji? and Güsten, 1990); with ozone in the atmosphere: 8.13 x 10-16 at 298 K (Japar et al., 1974) and 9.69 x 10-16 cm3/molecule?sec at 294 K (Adeniji et al., 1981); with NO3 in the atmosphere: 4.6 x 10-13 cm3/molecule?sec at 298 K (Atkinson, 1990) and 5.81 x 10-13 cm3/molecule?sec at 298 K (Sablji? and Güsten, 1990).
Chemical/Physical. Gaseous products formed from the reaction of cyclopentene with ozone were (% yield): formic acid, carbon monoxide, carbon dioxide, ethylene , formaldehyde, and butanal. Particulate products identified include succinic acid, glutaraldehyde, 5-oxopentanoic acid, and glutaric acid (Hatakeyama et al., 1987).
At elevated temperatures, rupture of the C-C bond occurs forming molecular hydrogen and cyclopentadiene (95% yield) as the principal products (Rice and Murphy, 1942).

läuterung methode

Free cyclopentene from hydroperoxide by refluxing with cupric stearate. Fractionally distil it from Na. It can be chromatographed on a Dowex 710-Chromosorb W GLC column. Methods for cyclohexene should be applicable here. Also, it has been washed with 1M NaOH solution followed by water. It was dried over anhydrous Na2SO4, distilled over powdered NaOH under nitrogen, and passed through neutral alumina before use [Woon et al. J Am Chem Soc 108 7990 1986]. It was distilled in a dry nitrogen atmosphere from powdered fused NaOH through a Vigreux column (p 11), and then passed through activated neutral alumina before use [Wong et al. J Am Chem Soc 109 3428 1987]. [Beilstein 5 IV 209.]

Cyclopenten Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Cyclopenten Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global( 286)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Hebei Mojin Biotechnology Co., Ltd
+8613288715578
sales@hbmojin.com China 12452 58
Henan Fengda Chemical Co., Ltd
+8613613820652
info@fdachem.com China 5085 58
Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512
info@tianfuchem.com China 21700 55
Shanghai Time Chemicals CO., Ltd.
+86-021-57951555 +8617317452075
jack.li@time-chemicals.com China 1807 55
Zhejiang ZETian Fine Chemicals Co. LTD
18957127338
stella@zetchem.com China 2141 58
Kingfirst chemical (nanjing) co.,ltd
86-25-84522992
marketing@kingfirstchem.com CHINA 95 58
Hebei Guanlang Biotechnology Co., Ltd.
+86-19930503282
alice@crovellbio.com China 8823 58
Wuhan Chemwonders Technology Inc.
027-85778276
info@chemwonders.com CHINA 176 58
Xiamen AmoyChem Co., Ltd
+86-592-6051114 +8618959220845
sales@amoychem.com China 6387 58
Hubei xin bonus chemical co. LTD
86-13657291602
linda@hubeijusheng.com CHINA 22968 58

142-29-0(Cyclopenten)Verwandte Suche:


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