ISOPROPYL BUTYRATE

Description

Isopropyl butyrate has a pleasant odor reminiscent of butyric acid. May be synthesized from butyric acid and propylene in presence of concentrated H2S04 at 125°C in sealed tube; also from butyric acid and isopropyl alcohol in the presence of HCL or p-toluenesulfonic acid.

Chemical properties

Colorless liquid.

Chemical properties

Isopropyl butyrate has a pleasant odor reminiscent of butyric acid.

Occurrence

Reported found in strawberry, cranberry, kumquat peel oil, apricot, papaya, blue cheeses, sparkling wine, passion fruit and spineless monkey orange

The Uses of ISOPROPYL BUTYRATE

Isopropyl butyrate was used as intravaginal taggant in the study of "breath test" for vaginal gel use.

The Uses of ISOPROPYL BUTYRATE

Solvent for cellulose ethers, flavoring.

Preparation

From butyric acid and propylene in presence of concentrated H2SO4 at 125°C in sealed tube; also from butyric acid and isopropyl alcohol in the presence of HCl or p-toluenesulfonic acid

Definition

ChEBI: Isopropyl butyrate is a fatty acid ester and an isopropyl ester.

Aroma threshold values

Detection: 43 to 86 ppb

Taste threshold values

Taste characteristics at 30 ppm: sweet, fruity, estry, green and ripe

General Description

A colorless liquid. Flash point near 30°F. Boiling point near 280°F. Less dense than water. Vapors heavier than air. Used as a solvent and to make flavorings.

Air & Water Reactions

Highly flammable. Soluble in water.

Reactivity Profile

ISOPROPYL BUTYRATE 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.

Health Hazard

May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

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.

Biochem/physiol Actions

Taste at 20 ppm