PROBLEM TO BE SOLVED: To provide a hair dye composition with high hair-dyeing properties.SOLUTION: A hair dye composition comprises a first agent and a second agent, where (1) first agent comprises (a) at least one selected from the group consisting of tannic acid, gallic acid and gallic acid derivatives, and (b) ammonium bicarbonate of 0.5 mass%-10 mass% relative to the total mass of the first agent, and (2) second agent comprises iron salt.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】染毛性が高い染毛剤組成物の提供。【解決手段】第1剤と第2剤とを有する染毛剤組成物であって、(1)第1剤が(a)タンニン酸、没食子酸及び没食子酸誘導体からなる群より選ばれる少なくとも1種と、(b)炭酸水素アンモニウムを第1剤の全質量に対して0.5質量%~10質量%と、を含み、(2)第2剤が鉄塩を含む、染毛剤組成物。【選択図】なし
