Abstract:
Iodine value is defined as the number of centigrams of iodine per gram of oil sample.
Drying property of fatty oils mainly depends on the type of unsaturated fatty acids and
relative amounts of each type of fatty acid in a unit weight of oil. Iodine value of fatty oil
is a quantitative measure of unsaturation and hence fatty oils are categorized into drying
oil, semidrying oil and non-drying based on iodine value. Fatty oils with iodine value
above 150mgg-l are called drying oils and iodine value in between 150mgg-l and 120mgg-l
are semi drying oils, whereas fatty oils having iodine values below 120 mgg' are classified
as non-drying oils.
