Isopentylacetat Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
PHYSIKALISCHE GEFAHREN
Der Dampf vermischt sich leicht mit Luft.
CHEMISCHE GEFAHREN
Reagiert sehr heftig mit starken Oxidationsmitteln unter Feuer- und Explosionsgefahr. Greift einige Harze an.
ARBEITSPLATZGRENZWERTE
TLV: 50 ppm (als TWA); 100 ppm (als STEL); (ACGIH 2005).
MAK: 50 ppm, 270 mg/m? Spitzenbegrenzung: überschreitungsfaktor I(1); Schwangerschaft: Gruppe D (DFG 2006).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation der Dämpfe und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C tritt langsam eine gesundheitsschädliche Kontamination der Luft ein.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Der Dampf reizt die Augen und die Atemwege. Exposition gegenüber hoher Dampfkonzentration kann zu Bewusstlosigkeit führen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Die Flüssigkeit entfettet die Haut.
LECKAGE
Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen.
R-Sätze Betriebsanweisung:
R10:Entzündlich.
R66:Wiederholter Kontakt kann zu spröder oder rissiger Haut führen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S25:Berührung mit den Augen vermeiden.
S2:Darf nicht in die Hände von Kindern gelangen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
Beschreibung
In commercial practice amyl invariably means isoamyl, unless it
is prefaced by the n- for normal. Isoamyl acetate has a powerful,
fruity odor with a bittersweet taste reminiscent of pear. If impure,
the odor is strong, penetrating, and almost shocking. Usually prepared by esterification of commercial isoamyl alcohol with acetic
acid.
Chemische Eigenschaften
Isoamyl Acetate is a strongly fruity-smelling liquid and has been identified in many fruit aromas. It is the main component of banana aroma and is, therefore, also used in banana flavors.
All isomers of amyl acetate are highly flammable, colorless to yellow, watery liquids.
Isoamyl acetate has a fruity, banana, sweet, fragrant, powerful odor with a bittersweet taste reminiscent of pear. If impure, the odor is strong, penetrating and almost shocking. In commercial practice, amyl invariably means isoamyl.
Physikalische Eigenschaften
Clear, colorless liquid with a banana or pear-like odor. Odor threshold concentration is 7 ppm
(quoted, Keith and Walters, 1992). A detection odor threshold concentration of 18 μg/m
3 (3.4
ppbv) was determined by Katz and Talbert (1930).
Occurrence
Reported to be found in a number of naturally occurring products, including apple, banana, cocoa bean, coffee, cognac, grape, peach, pear, pineapple and strawberry
Verwenden
Isoamyl acetate is used to impart pear flavorto mineral waters and syrups, in perfumes, inthe manufacture of artificial silk or leather, inphotographic films, in dyeing textiles, and asa solvent.
synthetische
By the esterification of commercial isoamyl alcohol with acetic acid
Vorbereitung Methode
The commerical-grade isoamyl acetate is prepared by the
esterification of amyl alcohol (often fusel oil) with acetic acid
and a small amount of sulfuric acid as the catalyst .
Definition
ChEBI: The acetate ester of isoamylol.
Allgemeine Beschreibung
Oily liquid; colorless; banana odor. Floats and mixes with water. Flammable, irritating vapor is produced .
Air & Water Reaktionen
Highly flammable. Insoluble in water.
Reaktivität anzeigen
Isoamyl acetate is an ester. Esters react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. Isoamyl acetate can react violently with oxidizing materials, nitrates, strong alkalis and strong acids.
Hazard
Flammable, moderate fire risk. Irritant.
Explosive limits in air 1–7.5%.
Health Hazard
Isoamyl acetate exhibits low toxicity; thetoxic effects are comparable to those of n amyl acetate. The toxic symptoms includeirritation of the eyes, nose, and throat;fatigue; increased pulse rate; and narcosis.Inhalation of its vapors at 1000 ppm for30 minutes may cause irritation, fatigue, andrespiratory distress in humans. It is more narcotic than are the lower acetic esters. TheLD50 value in rabbits is on the order of7000 mg/kg.
Brandgefahr
FLAMMABLE. Flashback along vapor trail may occur. Vapor may explode if ignited in an enclosed area. When heated emits acrid fumes. When exposed to flames can react vigorously with reducing materials.
mögliche Exposition
(n-isomer): Primary irritant (w/o allergic
reaction), (sec-isomer) Human Data. Amyl acetates are
used as industrial solvents and in the manufacturing and
dry-cleaning industry; making artificial fruit-flavoring
agents; cements, coated papers, lacquers; in medications
as an inflammatory agent; pet repellents, insecticides and
miticide. Many other uses.
Carcinogenicity
Not listed by ACGIH, California
Proposition 65, IARC, NTP, or OSHA.
Environmental Fate
Chemical/Physical. Slowly hydrolyzes in water forming 3-methyl-1-butanol and acetic acid.
Versand/Shipping
UN1993 Flammable liquids, n.o.s., Hazard
Class: 3; Labels: 3-Flammable liquid, Technical Name
Required.
läuterung methode
Dry the acetate with finely divided K2CO3 and fractionally distil it. [Beilstein 2 IV 157.]
Inkompatibilitäten
Vapors may form explosive mixture with
air. 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,
oxoacids, epoxides, nitrates. May soften certain plastics.
Waste disposal
Dissolve or mix the material
with a combustible solvent and burn in a chemical incinerator
equipped with an afterburner and scrubber. All federal,
state, and local environmental regulations must be observed.
In accordance with 40CFR165, follow recommendations for
the disposal of pesticides and pesticide containers. Must be
disposed properly by following package label directions or
by contacting your local or federal environmental control
agency, or by contacting your regional EPA office.
Isopentylacetat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
