Isobutylacetat Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
PHYSIKALISCHE GEFAHREN
Die Dämpfe mischen sich leicht mit Luft. Bildung explosionsfähiger Gemische.
CHEMISCHE GEFAHREN
Reagiert mit starken Oxidationsmitteln, starken Säuren und starken Basen unter Feuer- und Explosionsgefahr.
ARBEITSPLATZGRENZWERTE
TLV: 150 ppm (als TWA); (ACGIH 2005).
MAK: 100 ppm, 480 mg/m? Spitzenbegrenzung: überschreitungsfaktor I(2); Schwangerschaft: Gruppe C; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation der Dämpfe.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C tritt langsam eine gesundheitsschädliche Kontamination der Luft ein.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Der Dampf reizt leicht die Augen und die Atemwege. Möglich sind Auswirkungen auf das Zentralnervensystem. Exposition weit oberhalb der Arbeitsplatzgrenzwerte kann Bewusstseinstrübung verursachen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Die Flüssigkeit entfettet die Haut.
LECKAGE
Belüftung. Zündquellen entfernen. Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. NICHT in die Kanalisation spülen. Persönliche Schutzausrüstung: Atemschutzfilter für organische Gase und Dämpfe.
R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R66:Wiederholter Kontakt kann zu spröder oder rissiger Haut führen.
S-Sätze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S25:Berührung mit den Augen vermeiden.
S29:Nicht in die Kanalisation gelangen lassen.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.
Beschreibung
Isobutyl acetate has a fruity (currant-pear), floral (hyacinth-rose)
odor and a characteristic ether-like, slightly bitter flavor. May be
prepared by direct esterification of isobutyl alcohol with acetic
acid.
Chemische Eigenschaften
Isobutyl acetate is a colorless liquid with a fruit flavor. Isobutyl acetate is moisture sensitive, incompatible with ignition sources, moisture, excess heat, strong oxidizing agents, and strong bases; on decomposition, it releases carbon monoxide and carbon dioxide. It is used for nitrification fiber and paint solvents, chemical reagents, and modulation spices
Physikalische Eigenschaften
Colorless liquid with a fruity odor. Experimentally determined detection and recognition odor
threshold concentrations were 1.7 mg/m
3 (360 ppb
v) and 2.4 mg/m
3 (510 ppb
v), respectively
(Hellman and Small, 1974).
Occurrence
Reported found in, apple, apricot, banana, currants, guava, grapes, melon, pear, blackcurrant, papaya, pineapple, strawberry, vinegar, wheat bread, Parmesan and Gruyere cheese, beef fat, beer, cognac, rum, cider, whiskies, sherry, grape
wines, port, olive, cocoa, passion fruit, plum, starfruit, bantu beer, plum and grape brandy, mango, tamarind, apple brandy, figs, plum
wine, litchi, sake, nectarine, naranjilla fruit, Cape gooseberry and Roman chamomile oil.
Verwenden
Isobutyl Acetate is a flavoring agent that is a clear colorless liquid
with a fruity odor resembling banana when diluted. it is soluble in
alcohol, propylene glycol, most fixed oils, and mineral oil, and
slightly soluble in water. it is obtained by synthesis.
Definition
ChEBI: The acetate ester of isobutanol.
synthetische
By direct esterification of isobutyl alcohol with acetic acid.
Vorbereitung Methode
Isobutyl acetate may be made from methyl isobutyl
ketone. It may also be made by treating isobutanol
with acetic acid in the presence of catalysts. The
Tischenko reaction of acetaldehyde with isobutyraldehyde
yields a mixture of isobutyl acetate with ethyl acetate and
isobutyl isobutyrate.
Allgemeine Beschreibung
A clear colorless liquid with a fruity odor. Flash point 64°F. Less dense than water (6.2 lb / gal) and insoluble in water. Vapors are heavier than air .
Air & Water Reaktionen
Highly flammable. Insoluble in water.
Reaktivität anzeigen
Isobutyl acetate reacts exothermically with acids to give alcohols and other acids. May react sufficiently exothermically with strong oxidizing acids to ignite the reaction products. Reactions with bases also generate heat. Combination with strong reducing agents (alkali metals and hydrides) generates flammable hydrogen.
Hazard
Flammable, dangerous fire risk.
Health Hazard
Isobutyl acetate is more toxic but less of anirritant than n-butyl acetate. The toxic symp toms include headache, drowsiness, irritationof upper respiratory tract, and anesthesia.A 4-hour exposure to 8000 ppm was lethalto rats. It produced mild to moderate irri tation on rabbits’ skin. The irritation ineyes was also mild to moderate. The LD50oral value in rabbit is within the range4800 mg/kg.
Brandgefahr
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Chemische Reaktivität
Reactivity with Water No reaction; Reactivity with Common Materials: Softens and dissolves many types of plastics; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
mögliche Exposition
n-Butyl acetate is an important solvent
in the production of lacquers, leather and airplane dopes,
and perfumes. It is used as a solvent and gasoline additive.
sec-Butyl acetate is used as a widely used solvent for
nitrocellulose, nail enamels and many different purposes.
tert-Butyl acetate is common industrial solvent used in the
making of lacquers, artificial leather, airplane dope, perfume; and as a food additive. Isobutyl acetate is used as a
solvent and in perfumes and artificial flavoring materials
Environmental Fate
Chemical/Physical. Slowly hydrolyzes in water forming 2-methylpropanol and acetic acid.
At an influent concentration of 1,000 mg/L, treatment with GAC resulted in an effluent
concentration of 180 mg/L. The adsorbability of the carbon used was 164 mg/g carbon (Guisti et
al., 1974).
Versand/Shipping
UN1123 Butyl acetates, Hazard Class: 3; Labels:
3—Flammable liquid.
Inkompatibilitäten
All butyl acetates are incompatible with
nitrates, strong oxidizers; strong alkalies; strong acids.
Butyl acetates may form explosive mixture with air; reacts
with water, on standing, to form acetic acid and n-butyl
alcohol. Violent reaction with strong oxidizers and
potassium-tert-butoxide. Dissolves rubber, many plastics,
resins and some coatings. May accumulate static electrical
charges, and may cause ignition of its vapors
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.
Isobutylacetat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
