Patent ID: 7862625

Claim:
A one-part hair dye composition comprising the following components (A) to (D): (A) one or two or more compounds represented by the following formula (1): wherein, a broken line represents the presence or absence of a Ï€ bond, R 1 represents a hydroxy group or acetoxy group, R 2 represents a hydrogen atom, â€”COOR (wherein, R represents a hydrogen atom, a methyl group or an ethyl group) or â€”COO âˆ’ X + (wherein, X + represents a cation), and R 3 represents a hydrogen atom, an acetyl group, a methyl group or an ethyl group; (B) an antioxidant composed of a combination of ascorbic acid or salt thereof and sulfurous acid or salt thereof; (C) a nonionic surfactant; and (D) a thickening polymer, wherein the composition has a pH of 8 to 11.