- Esters are non-hydrocarbon organic compounds containing carbon, hydrogen and oxygen.
- It is formed when a carboxylic acid reacts with an alcohol.
CmH2m + 1COOCnH2n + 1
m = 0, 1, 2, 3
n = 1, 2, 3
| Methyl methanoate|
| Ethyl methanoate|
| Ethyl ethanoate|
- Esters are produced when carboxylic acid reacts with alcohol in the presence of concentrated sulphuric acid as a catalyst.
- This reaction is called the esterification reaction.
Physical Properties of Ester
- Ester has the following properties:
- having fragrant similar to fruits
- insoluble in water but soluble in organic solvent
- low boiling point
- less dense than water
- colourless liquid
- Ester can be found naturally in plants.
Uses of Ester in Daily Life
- As food flavourings
- as a fragrant in soap and detergent
- To make cosmetics (perfumes)
- To make medicine