PROBLEM TO BE SOLVED: To provide biocidal compounds being broad-spectrum microbial biocides that can be in a solution form immobilized on a substrate via physical coating or covalent chemical bonding or added to materials as additives so as to render the materials biocidal.SOLUTION: There is provided a cationic N-halamine analog with biocidal activity represented by the formula 2 in the figure.SELECTED DRAWING: Figure 4【課題】物理的コーティング若しくは共有化学結合によって基材上に固定する溶液形態、又は材料に添加剤として加えて材料を殺生物性にすることもできる、広域スペクトル微生物殺生剤である、殺生物化合物の提供。【解決手段】下式2で例示される殺生物活性のあるカチオン性N-ハラミン類似体。【選択図】図4