Introduction – Esters and their various effects on the human bodyEsters are carboxylic acid groups that have a carbonyl acid adjacent to both linkages. Esters can be produced by reactions of alcohols or carboxylic acids. This is that they have a –COOH group however the hydrogen in the group is a methyl instead. Benzene ring, ethyl other alkyl group. Esters occur in many different ways and have different effects on the human body, both beneficial and toxic. Esters are produced when carboxylic acids are boiled with alcohols with a catalyst which is usually sulfuric acid. A reaction to produce esters is reversible and slow and the reactions are often characterized by the odor formed which is usually a sweet, "fruity" aroma. Physical Properties Small esters can be easily confused because they have similar boiling points to ketones, the aldehyde with the same amount of carbon atoms attached. Esters are polar molecules with Van Der Waals forces and dipole-dipole bonds. An example of this would be carboxylic acid Butanoic acid has a boiling point of 164OC where as the ester ethyl acetate...