| abstract |
A salt useful as a dye and having excellent solubility in an organic solvent is provided. A salt of an n-valent organometallic anion M n- containing a metal atom capable of forming a bivalent or higher-valent metal ion and an onium cation derived from a dye capable of forming a salt with the organometallic anion, and organometallic anion has the formula (1): M n- nZ + (1) [ in the formula (1), M n-represents an organometallic anion above. Z + represents a hydrone or an alkali metal cation. n represents an integer of 1 to 3. When n is an integer greater than or equal to 2, several Z <+> may mutually be same or different. ] The salt characterized by satisfy | filling the following requirement A when it is set as the compound represented by this. Requirement A: The absorbance measured with a 0.028 g / L solution of the compound represented by formula (1) is 0.05 or less over 400 to 900 nm. [Selection figure] None |