Dibenzofuran Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R51/53:Giftig für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.
R22:Gesundheitssch?dlich beim Verschlucken.
R39/23/24/25:Giftig: ernste Gefahr irreversiblen Schadens durch Einatmen, Berührung mit der Haut und durch Verschlucken.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R11:Leichtentzündlich.
R20/21/22:Gesundheitssch?dlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R63:Kann das Kind im Mutterleib m?glicherweise sch?digen.
R43:Sensibilisierung durch Hautkontakt m?glich.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R45:Kann Krebs erzeugen.
S-S?tze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S29:Nicht in die Kanalisation gelangen lassen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S7:Beh?lter dicht geschlossen halten.
S7/9:Beh?lter dicht geschlossen an einem gut gelüfteten Ort aufbewahren.
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
Beschreibung
Dioxins and furans, two well-known environmental pollutants,
are extremely toxic to humans and many other species. Dibenzofurans
are released into the air from combustion sources,
and are listed as pollutants of concern due to its persistence
in the environment, potential to bioaccumulate, and toxicity
to humans and the environment. These compounds, when
adsorbed on soils or other substrates, are highly persistent
under normal environmental conditions. The Office of Environmental
Health Hazard Assessment reviews risk assessments
submitted under the Air Toxics ‘Hot Spots’ Program (AB 2588)
in which chlorinated dibenzo-p-dioxins and dibenzofurans are
listed. Chlorinated dibenzofurans were calculated as total
2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) equivalents in the
AB 2588 risk assessments. Dibenzofuran is cited in the Clean Air
Act 1990 Amendments – Hazardous Air Pollutants as a volatile
hazardous air pollutant of potential concern. The Superfund
Amendment Reauthorization Act Section 110 placed dibenzofuran
on the revised Agency for Toxic Substances and Disease
Registry priority list of hazardous substances to be the subject
of a toxicological profile. Dibenzofuran is also listed in the
Massachusetts Substance List for Right to Know Law, the New
Jersey Department of Health Hazard Right to Know Program
Hazardous Substance List, the Pennsylvania Department
of Labor and Industry Hazardous Substance List, and the
California’s Air Toxics ‘Hot Spots’ List (Assembly Bill 2588).
Chemische Eigenschaften
Dibenzofuran is a white crystalline powder.
Physikalische Eigenschaften
Colorless crystals having a creosote-like odor. The least detectable odor threshold concentration in
water at 60 °C was 2 μg/L (Alexander et al., 1982).
Verwenden
Dibenzofuran is an industrial chemical or by-product, and is
used as an insecticide, in the production of PVC, industrial
bleaching and incineration.
Definition
ChEBI: A mancude organic heterotricyclic parent that consists of a furan ring flanked by two benzene rings ortho-fused across the 2,3- and 4,5-positions.
Allgemeine Beschreibung
Colorless white crystalline solid.
Air & Water Reaktionen
Insoluble in water.
Reaktivit?t anzeigen
Dibenzofuran is sensitive to prolonged exposure to light .
Brandgefahr
Flash point data for Dibenzofuran are not available. Dibenzofuran is probably combustible.
m?gliche Exposition
This material is used as an insecticide
and in organic synthesis to make other chemicals. It is
derived from coal tar creosote.
Environmental Fate
Biological. Dibenzofuran was oxidized by salicylate-induced cells of Pseudomonas sp. strain
9816/11 and isopropyl-β-D-thiogalactopyranoside-induced cells of Escherichia coli JM109(DE3)
(pDTG141) to (1R,2S)-cis-1,2-dihydroxy-1,2-dihydrodibenzofuran (60–70% yield) and (3S,4R)-
cis-3,4-dihydroxy-3,4-dihydrodibenzofuran (30–40% yield) (Resnick and Gibson, 1996).
Soil. The estimated half-lives of dibenzofuran in soil under aerobic and anaerobic conditions
were 7 to 28 and 28 to 112 d, respectively (Lee et al., 1984).
Groundwater. Based on aerobic acclimated and unacclimated groundwater die away test data,
the estimated half-life of dibenzofuran in groundwater ranged from 8.54 to 34.9 d (Lee et al.,
1984).
Photolytic. The estimated half-life for the reaction of dibenzofuran with OH radicals in the
atmosphere ranged from 1.9 to 19 h (Atkinson, 1987).
Chemical/Physical. It was suggested that the chlorination of dibenzofuran in tap water
accounted for the presence of chlorodibenzofuran (Shiraishi et al., 1985).
Dibenzofuran will not hydrolyze because it has no hydrolyzable functional group (Kollig,
1995).
Versand/Shipping
UN3077 Environmentally hazardous substances,
solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous
hazardous material, Technical Name Required.
l?uterung methode
Dissolve dibenzofuran in diethyl ether, then shake it with two portions of aqueous NaOH (2M), wash it with water, separate and dry (MgSO4) it. After evaporating the ether, dibenzofuran is crystallised from aqueous 80% EtOH and then dried under vacuum. [Cass et al. J Chem Soc 1406 1958.] High purity material is obtained by zone refining. [Beilstein 17 V 234.]
Inkompatibilit?ten
This material is used as an insecticide
and in organic synthesis to make other chemicals. It is
derived from coal tar creosote.
Waste disposal
In accordance with
40CFR165, follow recommendations for the disposal of
pesticides and pesticide containers. Must be disposed prop-
erly by following package label directions or by contacting
your local or federal environmental control agency, or by
contacting your regional EPA office.
Dibenzofuran Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
