Abstract: An azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and excellent fastness such as light fastness, and a pigment dispersion containing the azo pigment are provided. An azo pigment represented by the following general formula (1) and a pigment dispersion containing the pigment: wherein G represents a hydrogen atom, an aliphatic group, an aryl group, a heterocyclic group, an acyl group, an aliphatic oxycarbonyl group, a carbamoyl group, or a sulfonyl group, R1 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group, R2 represents a substituent, A represents an aromatic 5- to 6-membered heterocyclic group, m represents an integer of from 0 to 5, and n represents an integer of from 1 to 4.

Abstract: An azo pigment and a pigment dispersion showing excellent coloring characteristics such as tinctorial strength and hue and excellent fastness such as light fastness are provided. An azo pigment represented by the following general formula (1), its tautomer, a salt or hydrate thereof: (wherein G represents a hydrogen atom, an aliphatic group, an aryl group, a heterocyclic group, an acyl group, an aliphatic oxycarbonyl group, a carbamoyl group, a sulfonyl group, R1 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group, R2 represents a substituent, A represents an aromatic 5- or 6-membered heterocyclic group, m represents an integer of from 0 to 5, n represents an integer of from 1 to 4 and, when n=2, the formula represents a dimer formed through R1, R2, A, or G and, when n=3, the formula represents a trimer formed through R1, R2, A, or G and, when n=4, the formula (1) represents a tetramer formed through R1, R2, A, or G.

Abstract: An ink composition having a suitably-adjusted hue and causing no decomposition of dyes during storage is provided. The ink composition contains a compound (a) represented by the following formula (1), an ingredient (c) and moisture-retentive agents, characterized by being from 0.1 mass % to lower than 7.0 mass % in content of the compound represented by the formula (1), 10.0 mass % or lower in content of a moisture-retentive agent having 3 or more hydroxyl groups (b) and lower than 30.0 in molar ratio of the moisture-retentive agent having 3 or more hydroxyl groups to the compound represented by the formula (1): wherein each of Ar1 and Ar2 preferably represents an aromatic heterocyclic group, each of A1 and A2 represents a hydrogen atom or a substituent, Y represents —OM or —NR1R2, M represents a hydrogen atom or a metal ion and each of R1 and R2 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group or the like. The ingredient (c) is at least one compound selected from C.I.

Abstract: An ink composition is provided which does not undergo decomposition or fading of colorants even when stored under high-temperature environment. An ink composition which contains a compound represented by the following general formula (1) and a humectant, wherein the content of the compound represented by the general formula (1) is from 0.1% by mass to less than 7.0% by mass, the content of the humectant having 3 or more hydroxyl groups is 8.0% by mass or less, and the molar ratio of the humectant having 3 or more hydroxyl groups/the compound represented by the general formula (1) being less than 15.

Abstract: An aqueous ink composition for inkjet recording, including: a coloring material containing at least one selected from the group consisting of azo pigments represented by the following formula (1) and tautomers thereof, and salts and hydrates thereof; a dispersant; and a urethane-modified polyester resin wherein Z represents a divalent group derived from a 5- to 8-membered nitrogen-containing heterocycle; Y1, Y2, R11 and R12 each independently represent a hydrogen atom or a substituent; G1 and G2 each independently represent a hydrogen atom, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; and W1 and W2 each independently represent an alkoxy group, an amino group, an alkyl group or an aryl group.

Abstract: An azo pigment represented by the following general formula (1), a tautomer of the azo pigment, and a salt or a hydrate thereof: wherein each of R1, R2, P1, P2, Q1, and Q2 independently represents a hydrogen atom or a substituent, G represents the non-metallic atoms necessary to complete a 5- to 6-membered heterocyclic group, W represents a substituent capable of binding to the heterocyclic group constituted by G, t represents an integer of from 0 to 4, each of Het-1 and Het-2 independently represents a group selected from specific aromatic heterocyclic groups.

Abstract: To provide an azo pigment composition having extremely good hue and extremely good light fastness and showing excellent tinctorial strength (color density) and, preferably, to provide an azo pigment composition further containing an azo pigment having characteristic X-ray diffraction peaks at different positions or a tautomer thereof. An azo pigment composition which contains at least one azo pigment represented by the following formula (1) and having characteristic peaks at Bragg angles (2?±0.2°) of 7.2° and 25.

Abstract: The present invention provides a mixed crystal having absorption properties that are excellent for color reproducibility as a blue pigment, and including a compound represented by the following Formula (I) and a compound represented by the following Formula (II), and a colored pigment dispersion composition including the mixed crystal and a medium. In Formula (I), X represents —SO—Z, —SO2—Z, —SO2NR1R2, —SO3R1, —CONR1R2 or —CO2R1; Z, R1 and R2 each independently represent an alkyl group, an aryl group, a heterocyclic group or the like; Y represents a monovalent substituent; M1 represents a hydrogen atom, a metal element or the like; and a and b are integers from 0 to 16 and satisfy the relationship of 0?a+b?16. In Formula (II), G1 to G4 and Q1 to Q4 each independently represent a carbon atom or a nitrogen atom, and A1 to A4 each independently represent a group of atoms necessary for forming an aromatic ring or heterocycle with the respective G1 to G4 and Q1 to Q4.

Abstract: Provided is an azo pigment represented by the following general formula (1), a tautomer of the azo pigment, and a salt or a hydrate thereof: wherein Q represents the non-metallic atoms necessary to complete a 5- to 7-membered heterocyclic group, W represents an alkoxy group, an amino group, an alkyl group, or an aryl group, X1 and X2 each independently represents a hydrogen, an alkyl group, an acyl group, an alkylsulfonyl group, or an arylsulfonyl group, R1 represents a hydrogen or a substituent, R2 represents a heterocyclic group, n represents an integer of from 1 to 4 and the general formula (1) represents a dimer formed through Q, W, X1, X2, R1, or R2 when n=2, a trimer formed through Q, W, X1, X2, R1, or R2 when n=3, and a tetramer formed through Q, W, X1, X2, R1, or R2 when n=4.

Abstract: To provide an azo pigment composition exhibiting very good hue and light fastness and having excellent tinctorial strength (color density) and preferably further provide an azo pigment composition containing an azo pigment having characteristic X-ray diffraction peaks at different positions or a tautomer thereof. An azo pigment composition comprising at least one kind of an azo pigment represented by formula (1) having characteristic X-ray diffraction peaks at Bragg angles) (2?±0.2°) of 7.6°, 25.6° and 27.

Abstract: An azo pigment represented by the general formula (1), a tautomer, salt, or hydrate thereof: wherein R1, R2, R3, Y, Z, and G each independently represents a hydrogen atom or a substituent, n represents an integer of from 2 to 4 and, when n=2, the general formula (1) represents a dimer formed through R1, R2, R3, Y, Z, or G and, when n=3, the general formula (1) represents a trimer formed through R1, R2, R3, Y, Z, or G and, when n=4, the general formula (1) represents a tetramer formed through R1, R2, R3, Y, Z, or G.

Abstract: Provided is an azo pigment having excellent coloring characteristics such as high tinctorial strength and hue and having excellent durability such as high resistance to light and ozone, a pigment dispersion containing the azo pigment, and a coloring composition.

Abstract: An azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and excellent fastness such as light fastness, and a pigment dispersion containing the azo pigment are provided. An azo pigment represented by the following general formula (1) and a pigment dispersion containing the pigment: wherein G represents an aliphatic group, an aryl group, or a heterocyclic group, Y represents a hydrogen atom or an aliphatic group, R1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group, R2 and R3 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group, X1 represents a nitrogen atom or C—Z, Z represents an electron-withdrawing group having a Hammett ?p value of 0.

Abstract: To provide an azo pigment excellent in coloristic characteristics such as tinctorial strength and hue and at the same time, excellent in the durability such as light fastness and ozone resistance, a pigment dispersion containing the azo pigment, a coloring composition, and an ink for inkjet recording. An azo pigment represented by the following formula (1), its tautomer, or a salt or hydrate thereof: (wherein R1, R2, R3, Y, Z and G each independently represents a hydrogen atom or a substituent; n represents and integer of 2 to 4; and the formula represents a dimer through R1, R2, R3, Y, Z or G when n is 2, represents a trimer through R1, R2, R3, Y, Z or G when n is 3, and represents a tetramer through R1, R2, R3, Y, Z or G when n is 4).

Abstract: To obtain an ink set capable of forming an image excellent in the light fastness and ozone fastness and reduced in the generation of a bronze phenomenon; an inkjet recording method; and a recorded material.

Abstract: A monoazo pigment is represented by the general formula (1), a tautomer of the monoazopigment, and a salt or a hydrate thereof: wherein R1, P1, and Q1 each independently represents a hydrogen or a substituent, G represents the non-metallic atoms necessary to complete a 5- to 6-membered heterocyclic group, W represents a substituent capable of binding to the heterocyclic group constituted by G, t represents an integer of from 0 to 5, Het-1 represents a group selected from the aromatic heterocyclic groups represented by the general formula (2): wherein X, Y, Z, W0, W1, W2, W3, and W4 each independently represents a hydrogen or a substituent, and * shows the point of attachment to the azo linkage in the general formula (1).

Abstract: An ink includes at least one coloring matter represented by a formula (I): wherein R1 represents one of an alkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heterocyclic group, an acyl group, an alkyloxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group and a sulfamoyl group, which may have a substituent; X1 represents one of —CR2? and a nitrogen atom, R2 represents one of a hydrogen atom and a substituent, and when R2 represents a substituent, R2 may have a substituent; X2 represents one of —CR3? and a nitrogen atom, and R3 represents an electron-withdrawing group having a ?p value of 0.20 or more; when X1 represents —CR2?, a pair of R1 and R2 and/or when X2 represents —CR3?, a pair of R2 and R3 each may combine to form a 5- to 7-membered ring; the coloring matter may form one of a dimer and a trimer through R1, R2, R3 or A; and A represents a prescribed aryl group or heterocyclic group etc.

Abstract: An ink includes at least one coloring matter represented by a formula (1): wherein X1 represents one of —CR1? and a nitrogen atom; X2 represents one of —CR2? and a nitrogen atom; X3 represents one of —CR3? and a nitrogen atom; R1, R2 and R3 each independently represents one of a hydrogen atom and a substituent; when R1, R2 and R3 each represents a substituent, the substituent may have a substituent; A represents one group selected from a prescribed pyridine ring group, pyrimidine ring group and quinoline ring group.

Abstract: The invention provides a water-based ink composition for inkjet recording which contains vinyl polymer particles containing a styrene-acrylic acid copolymer in which the total content of the constitutional units derived from styrene monomer, acrylic acid, and methacrylic acid is 45% by mass or more; and at least one of an azo pigment represented by Formula (1), a tautomer thereof, a salt or hydrate thereof; and a water-based liquid medium, and which is excellent in discharge stability after a long-term storage or after aging at high temperatures: wherein, Q represents a heterocyclic group; W represents an alkoxy group, an amino group etc.; X1 and X2 each independently represent a hydrogen atom, an alkyl group etc.; R1 represents a hydrogen atom or a substituent; R2 represents a heterocyclic group; and n represents an integer of 1 to 4.

Abstract: An ink composition including at least water, a cyan dye represented by the formula shown below and an aromatic compound having a carboxyl group and/or a salt thereof; an inkjet recording method using the composition; and recorded matter which is recorded by the recording method wherein M represents a hydrogen atom, a metal element, a metal oxide, a metal hydroxide or a metal halide, R1 to R4 each independently represents —SO2Z, and Z represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, provided that at least one of four Z's has an ionic hydrophilic group as a substituent.