Chemical properties
It appears as colorless to pale yellow liquid with the boiling point of 136 ° C and flash point of 22 ° C. It exhibits strong acid coke and fruit aroma with the incense of rum and ether.
The natural products exist in apples, papaya, strawberries, rums, wines and cocoa.
Application
- It as allowable food spices. Mainly used for the preparation of fruit wine flavor.
- Used as the intermediate of organic synthesis, solvents, paint softener.
Production
It is obtained from the esterification of crotonic acid and ethanol in the presence of concentrated sulfuric acid.
Chemical Properties
colourless liquid
Chemical Properties
Ethyl crotonate has a powerful, sour, caramellic-fruity odor.
Occurrence
Reported found in Fragaria vesca. Also reported found in guava fruit, guava peel, pineapple, white wine,
yellow passion fruit, fresh mango, naranjilla fruit, mussel, loganberry, apple, papaya, concord grape, strawberry, rum, cocoa, plum,
kiwifruit and other natural sources.
Uses
Solvent and softening agent, lacquers, organic
synthesis.
The commercial Ethyl crotonate, used in
flavor compositions, is a liquid.
It has a powerful and diffusive, sourcaramellic-fruity odor, reminiscent of unripe
berries.
This ester is used in imitation Strawberry,
occasionally also in Pineapple or other imitation fruit flavors.
The concentration used is generally very
low, classified as "traces" only.
Uses
Ethyl crotonate is used as a solvent for cellulose esters as well as a plasticizer for acrylic resins.
Uses
Ethyl Crotonate is a synthetic flavoring agent that is a moderately
stable, colorless to light yellow liquid of sharp winey note. it should
be stored in glass, tin, or resin-lined containers. it is used in fruit
flavors for application in baked goods, beverages, and candy at
2–7 ppm.
Preparation
By esterification of crotonic acid with ethyl alcohol in the presence of concentrated H2SO4.
Definition
ChEBI: Ethyl crotonate is a fatty acid ester.
Taste threshold values
Taste characteristics at 10 ppm: rum, cognac and pungent with caramellic and fruity nuances.
General Description
Ethyl
trans-2-butenoate is a volatile flavor compound found in fruits such as cashew apple, African star apple, naranjilla fruit and sweet passion fruit.
Hazard
Flammable, dangerous fire risk. Strong irritant.
Safety Profile
Moderately toxic by
ingestion and probably by inhalation. A skin ,
mucous membrane, and severe eye irritant.
Very dangerous fire hazard when exposed to
heat or flame; can react vigorously with
oxidizing materials. To fight fire, use foam,
CO2, or dry chemical. See also ESTERS.
When heated to decomposition it emits
acrid smoke and fumes.
Purification Methods
Wash it with aqueous 5% Na2CO3, then with saturated aqueous CaCl2, dry it with CaCl2 and distil it. [Beilstein 2 IV 1500.]
