| abstract |
To provide a dye for an anisotropic dye film to be formed by a wet system film-forming method, which is black and which has a high degree of polarization and a high degree of molecular orientation an anisotropic dye film using the dye, and the like. n nA trisazo dye for an anisotropic dye film to be formed by a wet system film-forming method, of which the free acid form is represented by the following formula (1), a dye composition for an anisotropic dye film containing the dye, an anisotropic dye film, and a polarizing element using the anisotropic dye film: n n nwherein A 1 is a phenyl group or aromatic heterocyclic group which may have a substituent, B 1 is an aromatic hydrocarbon group which may have a substituent, D 1 is an aromatic hydrocarbon group or aromatic heterocyclic group which may have a substituent, R 1 is a hydrogen atom, a hydroxyl group or an amino group which may have a substituent, and each of m and n is 0 or 1. |