PROBLEM TO BE SOLVED: To provide a novel homopiperazine derivative capable of enhancing bleach effects or decolorization effects on a bleacher or a decolorant using hydrogen peroxide as an oxidant such as a detergent for clothing, mold removing agent, breach of a pulp and hair dyeing agent.SOLUTION: A homopiperazine derivative is represented by the following general formula (1), where Rrepresents a hydrogen atom, Rrepresents a specific substituent including a hydroxyl group, k is an integer of 0 or 1 to 10, Rrepresents a hydroxyl group, an aliphatic hydrocarbon group with 1 to 24 carbon atoms and which may have a substituent or an aromatic hydrocarbon group with 5 to 12 carbon atoms and which may have a substituent.SELECTED DRAWING: None
