Benzoisoindole derivative, pigment composition comprising the same and colored composition

A pigment composition comprising a pigment and a benzoisoindole derivative represented by Formula (1):

• where:
• R1 denotes a hydrogen atom, an alkyl group that may have one or more substituents, or an acyl group that may have one or more substituents;
• R2, R3, R5, R6, R7, R8, R9 and R10 each independently denote a hydrogen atom, an alkyl group that may have one or more substituents, a phenyl group, a halogen atom, a cyano group, an alkoxy group that may have one or more substituents, or —NR12R13, where R12 and R13 each independently denote a hydrogen atom or an alkyl group that may have one or more substituents, or R12 and R13 may be bonded together to form a heterocyclic ring that may further contain a nitrogen, oxygen or sulfur atom;
• R4 denotes a hydrogen atom, an alkyl group that may have one or more substituents, an acyl group that may have one or more substituents, or a substituent represented by Formula (2):
• —Y-(Z)k (2)
• where Y denotes a direct bond, —O—, —S(O)m— (where m denotes an integer of from 0 to 3), —CO—, —NR14—, —CONR14—, —SO2NR14, —NR14CO—, NR14SO2— (where R14 denotes a hydrogen atom, an alkyl group or a hydroxylalkyl group), a linear or branched alkylene having 1 to 12 carbon atoms, or a benzene residue or triazine residue that may be substituted with an alkyl group, an amino group, a nitro group, a hydroxyl group, an alkoxy group or a halogen atom, or a linking group formed of two or more of these linking groups;
• Z denotes a hydrogen atom, a halogen atom, an alkyl group that may have one or more substituents, an aryl group that may have one or more substituents, a phthalimidomethyl group that may have one or more substituents, —NR15R16, —SO3.M/n or —COO.M/n, where R15 and R16 each independently denote a hydrogen atom, an alkyl group that may have one or more substituents, an alkenyl group that may have one or more substituents or a phenyl group that may have one or more substituents, or R15 and R16 may be bonded together to form a heterocyclic ring that may further contain a nitrogen, oxygen or sulfur atom and that may have one or more substituents;
• M denotes a hydrogen ion, a mono- to trivalent metal ion or an ammonium ion at least one hydrogen atom of which is substituted with an alkyl group;
• n denotes valence of M;
• and k denotes an integer of 1 or 2;
• and
• R11 denotes a hydrogen atom, a halogen atom, a nitro group, a cyano group, a hydroxyl group, an alkoxy group that may have one or more substituents, an aryloxy group that may have one or more substituents, —S(O)mR17, —NR18R19 or —N2+X−, where m is an integer of from 0 to 3, R17 denotes a hydrogen atom, an alkyl group that may have one or more substituents, an aryl group that may have one or more substituents, or a halogen atom;
• R18 and R19 each independently denote a hydrogen atom or an alkyl group that may have one or more substituents, or R18 and R19 may be bonded together to form a heterocyclic ring that may further contain a nitrogen, oxygen or sulfur atom;
• and X denotes a halogen atom.