Sulfonamide derivative

摘要

The sulfonamide derivative according to the present invention is expressed by a general formula: <IMAGE> (where R11 represents an alkyl group having 5 or less carbon atoms; Each of L11, L12 and L13 represents an alkylene group; Each of M11 and M12 represents a hydrogen atom or a cation.) This compound is suitable for the applications such as photographic processing solution, for chelate titration or analytical reagent for medical treatment or for medical drugs as a metallic ion shielding agent.