Bromine_number
Bromine number
Mass of bromine absorbed by 100 grams of a given substance
In chemistry, the bromine number is the amount of bromine (Br2) in grams absorbed by 100 g of a sample. The bromine number was once used as a measure of aliphatic unsaturation in gasoline and related petroleum samples, but this assay has fallen into disuse with the introduction of spectroscopic and chromatographic analyses.