PROBLEM TO BE SOLVED: To provide a dye for hair dyeing excellent in dyeing property to human hair or a keratin fiber of domestic animals, especially hair, good in water solubility, and excellent in light fastness resistance and shampoo fastness, and to provide a composition for hair dyeing containing the same.SOLUTION: A dye for hair dyeing contains a compound represented by the formula (I), where R1, R2 and 3 represent each independently a straight or a branched alkyl group having 1 to 5 carbon atoms, or a phenyl group which may have a substituent, and An- represents an inorganic anion or an organic anion.COPYRIGHT: (C)2014,JPO&INPIT【課題】人の毛髪や家畜のケラチン繊維、特に毛髪に対して染着性に優れかつ水溶解性が良好で、耐光堅牢性およびシャンプー堅牢性に優れた染毛用染料、及びそれを含有する染毛用組成物の提供。【解決手段】式(I)で表される化合物からなる染毛用染料。[式中、R1、R2およびR3は、それぞれ独立に、直鎖若しくは分岐の炭素数1~5のアルキル基又は置換基を有しても良いフェニル基、An-は無機陰イオン又は有機陰イオンを示す。]【選択図】なし
