Dichroic azo compound and composition containing the same

A compound represented by the following Formula (1):

• where:
• R1 represents a hydrogen atom, a C1-C20 alkyl group, a C1-C20 alkoxy group, a C1-C20 acyl group, a C2-C20 alkoxycarbonyl group, a C1-C20 acyloxy group, or —N(R10)(R11);
• R10 represents a C1-C20 acyl group, a C1-C20 alkylsulfonyl group, or a C6-C20 arylsulfonyl group;
• and R11 represents a hydrogen atom or a C1-C20 alkyl group;
• R10 and R11 can bond to each other, and form, with a nitrogen atom to which R10 and R11 bond, a ring including —N—CO— or —N—SO2—;
• at least one hydrogen atom of any of the alkyl group, the alkoxy group, the acyl group, the alkoxycarbonyl group, the acyloxy group, the alkylsulfonyl group, and the arylsulfonyl group can be substituted by a halogen atom, a hydroxy group, an unsubstituted amino group, or a substituted amino group;
• —O— or —NR20— can be inserted between carbon atoms of any of the alkyl group and the alkoxy group;
• and R20 represents a hydrogen atom or a C1-C20 alkyl group;
• R2 through R4 are substituents which are not hydrogen atoms and each independently represent a C1-C4 alkyl group, a C1-C4 alkoxy group, a halogen atom, or a cyano group;
• at least one hydrogen atom of any of the alkyl group and the alkoxy group can be substituted by a halogen atom or a hydroxy group;
• and m, p, and q are each independently an integer of 0 to 2;
• and
• R5 is a C1-C10 alkyl group in which a hydrogen atom is substituted by at least one hydroxy group;
• and the aliphatic hydrocarbon chain in R5 can be a linear chain or a branched chain.