Gegenstand der vorliegenden Erfindungen sind Mittel zum Aufhellen von keratinischen Fasern, insbesondere menschlichen Haaren, enthaltend in einem kosmetischen Trägermindestens einen Carbonsäureester der Formel (I)The present invention relates to agents for whitening keratinic fibers, in particular human hair, containing in a cosmetic carrier at least one carboxylic acid ester of formula (I) at least one peroxide compound, andwater, wherein the agent has a pH in the range of 7.5 to 12.5 own.Ein further object of the present invention is a multi-component packaging unit, in which the above-mentioned Ingredients are packaged separately in two agents (A) and (B).