The bromine number and bromine index are important quality control parameters for the determination of aliphatic C=C
double bonds in petroleum products. Both indices provide information on the content of substances that react with
bromine. The difference between the two indices is that the bromine number indicates the consumption of bromine in g
for 100 g sample and the bromine index in mg for 100 g sample.
This Application Bulletin describes the determination of the bromine number according to ASTM D1159, ISO 3839, BS
2000-130, IP 130, GB/T 11135 and DIN-51774-1. The bromine index determination for aliphatic hydrocarbons is described according to ASTM D2710, IP 299, GB/T 11136 and DIN 51774-2. For aromatic hydrocarbons the determination of the bromine index is described according to ASTM D5776 and SH/T 1767. UOP 304 is not recommended for the determination of the bromine number or bromine index because its titration solvent contains mercuric chloride.