Quality & Sensory

Iodine value IV

Grams of iodine absorbed by 100 g of fat, measuring total unsaturation.

Real-life application

Tells a cooking-oil buyer or blender how likely an oil is to turn rancid — higher values mean more unsaturated fat and faster spoilage.

Related terms

Addition of hydrogen across double bonds of unsaturated fatty acids using a nickel catalyst, raising melting point and oxidative stability.

Milligrams of KOH needed to saponify one gram of fat.

Practise the subject behind the definition.