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
Hydrogenation
Food ChemistryAddition of hydrogen across double bonds of unsaturated fatty acids using a nickel catalyst, raising melting point and oxidative stability.
Saponification value
Quality & SensoryMilligrams of KOH needed to saponify one gram of fat.
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