The present disclosure relates to compositions for the bleaching of keratinous fibers comprising at least one peroxygenated salt and at least one non-volatile liquid branched ester of a carboxylic acid, the solidification point of which is below 4° C., chosen from the compounds with the following structure: R1—CO—O—R2, wherein R1 and R2 are each independently chosen from a C1-C30 hydrocarbon chain optionally interrupted by at least one oxygen atom and/or by at least one carbonyl group and optionally substituted by at least one hydroxyl groups, R1 being branched. The composition disclosed herein for the bleaching of keratinous fibers exhibits an improved resistance to low temperatures and makes it possible to avoid the problem of syneresis during storage at low temperatures and during transportation in which temperature cycles occur.