FIELD: chemistry.SUBSTANCE: invention relates to synthesis α,ω-dibromo-oxa-perfluoroalkanes intended for producing oxygenating submicron emulsions for medical and biotechnological purposes, by anodic oxidation of ω-bromopolyoxaperfluorocarboxylic acids.EFFECT: production of oxygenating submicron emulsions for medical and biological purposes.5 cl, 8 ex