Benzofuran

Bezeichnung:Benzofuran

CAS-Nr271-89-6

Englisch Name:Benzofuran

CBNumberCB8853413

SummenformelC8H6O

Molgewicht118.14

MOL-Datei271-89-6.mol

Synonyma

Benzofuran

2,3-Benzofuran

Cumaron

Benzofuran physikalisch-chemischer Eigenschaften

Schmelzpunkt	<-18℃
Siedepunkt	173-175 °C(lit.)
Dichte	1.095 g/mL at 20 °C(lit.)
Brechungsindex	n20/D 1.567
Flammpunkt	133 °F
storage temp.	2-8°C
Löslichkeit	soluble in Dichloromethane
pka	33.2
Aggregatzustand	Crystalline Powder or Crystals
Farbe	Yellow to green to yellow-brown
Wasserlöslichkeit	insoluble
Merck	14,1088
BRN	107704
LogP	2.670
CAS Datenbank	271-89-6(CAS DataBase Reference)
IARC	2B (Vol. 63) 1995
NIST chemische Informationen	Benzofuran(271-89-6)
EPA chemische Informationen	Benzofuran (271-89-6)

Sicherheit

Kennzeichnung gefährlicher	Xn,Xi
R-Sätze:	40-52-10
S-Sätze:	36/37-16
RIDADR	UN 1993 3/PG 3
WGK Germany	3
RTECS-Nr.	DF6423800
F	10-23
Hazard Note	Irritant
TSCA	Yes
HazardClass	3
PackingGroup	III
HS Code	29329900
Giftige Stoffe Daten	271-89-6(Hazardous Substances Data)
Toxizität	Isolated from coal oil and used in the manufacture of coumarone-indene resin. This resin is used in paints, glue, etc. and is allowed in food packaging. Little is known about the toxicity of benzofuran to humans but acute toxicity in experimental animals involves liver and kidney failure. Chronic toxicity to animals involves damage to the liver, kidneys, lungs, and stomach. Lifetime administration (oral administration) caused cancer in both rats and mice.

Gefahreninformationscode (GHS)

Benzofuran Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSE öLIGE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Langsame Polymerisation bei Raumtemperatur, schneller jedoch unter Einfluss von Hitze und unter Einfluss von sauren Katalysatoren.
ARBEITSPLATZGRENZWERTE
TLV nicht festgelegt (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation des Aerosols.
INHALATIONSGEFAHREN
Nur ungenügende Angaben vorhanden über die Geschwindigkeit, mit der eine gesundheitsschädliche Konzentration in der Luft beim Verdampfen bei 20°C erreicht wird.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Möglich sind Auswirkungen auf Nierenund Leber. Möglicherweise krebserzeugend für den Menschen.
LECKAGE
Zündquellen entfernen. Ausgelaufene Flüssigkeit in abgedeckten Behältern sammeln. NICHT in die Kanalisation spülen. NICHT in die Umwelt gelangen lassen.
R-Sätze Betriebsanweisung:
R40:Verdacht auf krebserzeugende Wirkung.
R52:Schädlich für Wasserorganismen.
R10:Entzündlich.
S-Sätze Betriebsanweisung:
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
Chemische Eigenschaften
2,3-Benzofuran is a colorless, sweet-smelling, oily liquid made by processing coal into coal oil. It may also be formed during other uses of coal or oil. 2,3-Benzofuran is not used for any commercial purposes, but the part of the coal oil that contains 2,3-benzofuran is made into a plastic called coumarone-indene resin. This resin resists corrosion and is used to make paints and varnishes. The resin also provides water resistance and is used in coatings on paper products and fabrics. It is used as an adhesive in food containers and some asphalt fl oor tiles. The resin has been approved for use in food packages and as a coating on citrus fruits. We do not know how often the resin is used or whether any 2,3-benzofuran in the coating or packaging gets into the food. 2,3-Benzofuran may enter the air, water, and soil during its manufacture, use, or storage at hazardous waste sites. Breathing contaminated air or touching the chemical in the workplace is the source of human exposure.
Verwenden
Benzo[b]furan is used in the manufacture of coumarone-indene resin. It has been used to make floor tiles and other products. It is also used as a coating on grapefruit, lemons, lirnes, oranges, tangelos and tangerines and in the production of COITosion-resistant paints and varnishes, in water-resistant coatings on paper products and fabrics and as adhesives in food containers.
Verwenden
As an intermediate in the polymerization of coumarone-indene resins found in various corrosion-resistant coatings such as paints and varnishes; in water-resistant coatings for paper products and fabrics; in adhesives for use in food containers
Verwenden
manufacture of coumarone-indene resins.
Definition
A bicyclic ring compound derived from coal tar naphtha, the parent substance of coumarone-indene resins.
Synthesis Reference(s)
The Journal of Organic Chemistry, 44, p. 28, 1979 DOI: 10.1021/jo01315a008
Allgemeine Beschreibung
Clear oily yellow liquid with an aromatic odor.
Air & Water Reaktionen
Highly flammable. May be sensitive to prolonged exposure to air. Very slightly water soluble.
Reaktivität anzeigen
Benzofuran slowly polymerizes on standing. Benzofuran may be sensitive to prolonged exposure to air. Benzofuran is polymerized by H2SO4.
Hazard
Possible carcinogen.
Health Hazard
Rats and mice that ingested high levels of 2,3-benzofuran over a short time had liver and kidney damage. Those exposed over a long time to moderate levels had liver, kidney, lung, and stomach damage. In one study, the ability of animals to reproduce was not affected. We do not know if people will experience health effects similar to those seen in animals.
Health Hazard
ACUTE/CHRONIC HAZARDS: When heated to decomposition Benzofuran emits acrid and irritating smoke and fumes.
Brandgefahr
Benzofuran is combustible.
Carcinogenicity
Benzofuran was not mutagenic in bacterial assays but did cause chromosomal aberrations and sister chromatid exchanges in cultured rodent cells.
läuterung methode
Benzofuran is steam distilled, dissolved in Et2O, washed with 5% aqueous NaOH, saturated NaCl, dried (Na2SO4), evaporated and redistilled. UV: max 245, 275, 282nm (log 4.08, 3.45, 3.48). The picrate has m 102-103o. [Burgstahler & Worden Org Synth Coll Vol V 251 1973, NMR: Black & Heffernan Aust J Chem 18 353 1965, Beilstein 17/2 V 3.]

Benzofuran Upstream-Materialien And Downstream Produkte

Benzofuran Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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