| abstract |
(57) [Problem] To provide a reagent composition simultaneously containing a color-forming hydrogen donor and albumin, which can significantly suppress spontaneous color development during long-term storage. A reagent composition for forming a dye by reacting hydrogen peroxide, a hydrogen donor, and a hydrogen acceptor, and quantifying the formed dye, comprising at least the hydrogen donor, albumin And an aniline derivative in which an alkoxyl group is not bonded to any of the 3- and 5-positions as the hydrogen donor. |