Organic colorant, coloring composition, and inkjet ink

A coloring composition comprising

• an organic solvent, and
• an organic colorant of General Formula (1) below:
• where in the General Formula (1), R1 and R2 each independently represent an alkenyl group including from 2 to 20 carbon atoms, a phenyl group, a naphthyl group, or a group represented by —(CH2)n—COO—R3, —(CH2)n—R4, —(CH2)n—CONH—R5, —CR6R7—COO—R8, or —(CH2)n—OCOCH3;
• R3 represents a hydrogen atom or an alkyl group including from 1 to 2 carbon atoms;
• R4 represents a hydroxy group, an alkoxy group including from 1 to 2 carbon atoms, an alkenyloxy group including from 2 to 5 carbon atoms, a SO3Na group, an OSO3Na group, a phenyl group, a phenylalkyl group where an alkyl portion of the phenylalkyl group includes from 1 to 3 carbon atoms, a naphthyl group, or a naphthylalkyl group where an alkyl portion of the naphthylalkyl group includes from 1 to 3 carbon atoms;
• R5 represents an alkyl group including from 1 to 20 carbon atoms, an alkenyl group including from 2 to 20 carbon atoms, or a hydroxyalkyl group including from 1 to 12 carbon atoms;
• R6 represents a hydrogen atom or a methyl group;
• R7 represents an alkyl group including from 1 to 4 carbon atoms;
• R8 represents an alkyl group including from 1 to 5 carbon atoms;
• and n is an integer of from 1 to 12,
• wherein when R1 or R2 represent a phenyl group and said phenyl group is substituted the substituent is at least one selected from the group consisting of an alkyl group, an alkenyl group, a hydroxyalkyl group, a hydroxyl group, an alkoxy group, an alkenyloxy group, a cyanoalkyl group, a carboxy group, an alkoxycarbonyl group, and an amino group.

An ink comprising

• an organic solvent, and
• an organic colorant of General Formula (1) below:
• where in the General Formula (1), R1 and R2 each independently represent an alkenyl group including from 2 to 20 carbon atoms, a phenyl group, a naphthyl group, or a group represented by —(CH2)n—COO—R3, —(CH2)n—R4, —(CH2)n—CONH—R5, —CR6R7—COO—R8, or —(CH2)n—OCOCH3;
• R3 represents a hydrogen atom or an alkyl group including from 1 to 2 carbon atoms;
• R4 represents a hydroxy group, an alkoxy group including from 1 to 2 carbon atoms, an alkenyloxy group including from 2 to 5 carbon atoms, a SO3Na group, an OSO3Na group, a phenyl group, a phenylalkyl group where an alkyl portion of the phenylalkyl group includes from 1 to 3 carbon atoms, a naphthyl group, or a naphthylalkyl group where an alkyl portion of the naphthylalkyl group includes from 1 to 3 carbon atoms;
• R5 represents an alkyl group including from 1 to 20 carbon atoms, an alkenyl group including from 2 to 20 carbon atoms, or a hydroxyalkyl group including from 1 to 12 carbon atoms;
• R6 represents a hydrogen atom or a methyl group;
• R7 represents an alkyl group including from 1 to 4 carbon atoms;
• R8 represents an alkyl group including from 1 to 5 carbon atoms;
• and n is an integer of from 1 to 12,
• wherein when R1 or R2 represent a phenyl group and said phenyl group is substituted the substituent is at least one selected from the group consisting of an alkyl group, an alkenyl group, a hydroxyalkyl group, a hydroxyl group, an alkoxy group, an alkenyloxy group, a cyanoalkyl group, a carboxy group, an alkoxycarbonyl group, and an amino group.