Commercial extractant LIX 54-100 was analysed and its components were separated by GC and identified with MS. It contains some amounts of hydrocarbons, including C-11-C-14 alkanes as a solvent, six isomeric 1-phenyldecane-1,3-diones with different alkyl group structures, heptadecane-8,10-dione, 1,3-diphenyl-propane-1,3-dione and an unknown compound with a carbonyl group as a fragmantation product.