General Description
A colorless liquid with a pleasant fruity odor. Moderately toxic by inhalation. Insoluble in water and floats on water, but soluble in alcohol and ethers. ISOBUTYL ISOBUTYRATE(97-85-8) is used as a flavoring and in the manufacture of insecticides.
Reactivity Profile
ISOBUTYL ISOBUTYRATE, [FLAMMABLE LIQUID] reacts 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 with caustic solutions. Flammable hydrogen is generated by mixing with alkali metals and hydrides.
Air & Water Reactions
Highly flammable. Insoluble in water.
Hazard
Toxic by inhalation.
Health Hazard
Exposure can cause irritation of eyes, nose and throat. Toxic by inhalation.
Description
Isobutyl isobutyrate has an odor and taste reminiscent of pineapple.
May be synthesized by catalytic reaction passing vapors of isobutyl alcohol over CuO + Al2O3, ZnO + Al2O3, or CuO + ZnO +
Al2O3 at 350 - 400°C under pressure.
Chemical Properties
CLEAR LIQUID
Chemical Properties
Isobutyl isobutyrate has an odor and taste reminiscent of pineapple.
Occurrence
Reported found in the essential oil of hops, grapes, apricot, banana, melon, strawberry, cider, passion fruit wine,
sherry, grape wines, whiskey, olive, quince, plum wine, laurel, myrtle leaf and berry, Chinese quince and Roman chamomile oil.
Definition
ChEBI: 2-Methylpropyl 2-methylpropionate is a carboxylic ester.
Preparation
By catalytic reaction passing vapors of isobutyl alcohol over CuO + Al2O3, ZnO + Al2O3, or CuO + ZnO + Al2O3 at 350
to 400°C under pressure
Aroma threshold values
Detection: 36 ppb to 4.37 ppm; aroma characteristics at 1.0%: sweet, estry and fruity, winey, plum, apple
and banana-like
Toxics Screening Level
Using the NOAEL of 1000 mg/kg from the gavage study, where (1 kg)/(.93 m3) is the inhalation rate for Wistar rats as
cited in EPA 1988.
Therefore an AAC of 300 μg/m3, with annual averaging, should be
acceptable.
