Hot Products

Acid Dye Acid Red GR Acid Red 73

Acid Dye Acid Red 3R Acid Red 18

Fertilizer Dye Acid Light Green

Leather Dye Acid Black 210

Wool Dye Acid Black 10B Acid Black 1

Nylon Dye Tracid Violet 4BNS Acid Violet 17

Acid Dye Acid Red G Acid Red 1

Nylon Dye Acid Orange Ⅱ Acid Orange 7

Fabric Dye Tracid Dark Blue 5R Acid Blue 113

Wool Dye Tracid Brilliant Blue 6B Acid Blue 83

Pigment Intermediates Suppliers in China: High-Quality Factory Raw Materials for Azo and Anthraquinone Pigments

In the production of azo pigments, including yellow, orange, and red shades, China suppliers offer high-quality benzene-based intermediates as essential raw materials.

Naphthalene-based intermediates, such as 2-naphthol, 2,3-acid, Tobler acid, and J acid, are available from reliable suppliers and are vital for synthesizing phenolic azo pigments and certain acidic pigments in our factory.

For high-performance applications, anthraquinone-based intermediates, including anthraquinone, 1-aminoanthraquinone, and bromoacetic acid, are produced in our factory, providing excellent fastness in anthraquinone reducing pigments and acidic pigments sought after by customers worldwide.

Product Details

📌 Product Details

"Pigment intermediates" and the "dye intermediates" discussed in the previous round are essentially the same substance. They are both various aromatic hydrocarbon derivatives used in the production of dyes and organic pigments, and are key raw materials in the fine chemical industry.

💡

The key difference lies not in the intermediate itself, but in the subsequent processing technology and the performance requirements of the final product — two dishes from the same raw material.

Classification and Properties of Pigment Intermediates

Type	Core Raw Material	Representative Intermediates	Main Characteristics	Primary Uses
Benzene-based	Benzene, toluene, chlorobenzene	3,3'-dichlorobenzidine, p-nitroaniline, 2,3-acid, red-based KD	Highest production volume, relatively low cost	Azo pigments (yellow, orange, red); broad chromatogram
Naphthalene-based	Naphthalene	2-naphthol, 2,3-acid, torpor acid, J acid, H acid	Contains sulfonic acid group; soluble in alkalis	Phenolic azo pigments and acidic pigments; vibrant colors
Anthraquinone-based	Anthracene	Anthraquinone, 1-aminoanthraquinone, bromoacetic acid	Excellent overall fastness; higher cost	High-performance anthraquinone reducing & acid pigments; outstanding lightfastness and heat resistance
Heterocyclic & High-Performance	Phthalic anhydride, urea, phthalonitrile, cyanuric chloride	Phthalocyanine, quinacridone, perylene tetracarboxylic anhydride, DPP intermediates	Most complex structure; top-tier performance	Phthalocyanine blue/green, quinacridone red, DPP red; preferred for automotive paints & high-grade inks

Detailed Overview: Four Major Intermediate Types

🔵 1. Benzene-Based Intermediates

Core raw materials include benzene, toluene, and chlorobenzene, with each molecule containing a benzene ring. Representative intermediates include 3,3'-dichlorobenzidine, p-nitroaniline, 2,3-acid, and red-based KD.

Main characteristics and uses: Highest production volume and relatively low cost. Used for synthesizing the highest-yielding azo pigments (yellow, orange, and red spectra), with a broad chromatogram, but some varieties have moderate fastness.

Yellow Pigments Orange Pigments Red Pigments Azo Pigments

🟢 2. Naphthalene-Based Intermediates

Core raw material is naphthalene, with each molecule containing a naphthalene ring. Representative intermediates include 2-naphthol, 2,3-acid, torpor acid, J acid, and H acid.

Main characteristics and uses: Contains a sulfonic acid group in its structure, usually soluble in alkalis. Used for synthesizing phenolic azo pigments and some acidic pigments, producing vibrant colors.

Phenolic Azo Pigments Acidic Pigments Vibrant Colors

🟣 3. Anthraquinone-Based Intermediates

Core raw material is anthracene, with each molecule containing anthraquinone structures. Representative intermediates include anthraquinone, 1-aminoanthraquinone, and bromoacetic acid.

Main characteristics and uses: Excellent overall fastness, but higher cost. Used for the production of high-performance anthraquinone reducing pigments and acid pigments, exhibiting outstanding lightfastness and heat resistance.

High Lightfastness Heat Resistance Reducing Pigments

🌟 4. Heterocyclic & High-Performance Intermediates

Core raw materials include phthalic anhydride, urea, phthalonitrile, and cyanuric chloride, with molecules containing heterocycles such as oxygen, nitrogen, and sulfur. Representative intermediates include phthalocyanine, quinacridone, perylene tetracarboxylic anhydride, and DPP (pyrrolopyrrole dione) intermediates.

Main characteristics and applications: The most complex structure, difficult to synthesize, and possessing top-tier performance. Used for the production of phthalocyanine pigments (such as phthalocyanine blue/green) and high-end high-performance organic pigments (such as quinacridone red and DPP red), exhibiting excellent weather resistance and heat resistance, making them the preferred choice for automotive paints and high-grade inks.

Phthalocyanine Blue/Green Quinacridone Red DPP Red Automotive Paints High-Grade Inks

From Pigment Intermediate to Finished Pigment: Process Differences Between Pigments and Dyes

The "branching of the road" for pigments and dyes mainly begins in the later stages of synthesis:

Different Synthesis Stage Requirements

Although both involve reactions such as diazotization and coupling, pigment synthesis has more stringent requirements for crystal form and particle shape, as this directly affects the pigment's hue, hiding power, and coloring intensity.

Pigmentation — The Key Step

While dye precursors can be ground and auxiliaries added, the "filter cake" after pigment synthesis must undergo a special pigmentation treatment, including:

🔷

Controlling Crystal Form: Through specific solvents or heat treatment, pigment molecules are grown into specific stable crystal forms (such as the α and β crystal forms of phthalocyanine blue).

🔶

Surface Treatment: Rosin, surfactants, etc., are added to coat the surface of pigment particles, preventing aggregation and improving dispersibility and rheological properties in inks or coatings.

🔹

Ultra-fine Grinding: Finer than dye grinding, ensuring the pigment achieves ideal coloring results in the application medium.

Example: Production of Phthalocyanine Blue

Taking the widely used Phthalocyanine Blue as an example:

⚗️

Core Intermediates

Phthalic anhydride, urea, cuprous chloride

→

🔬

Synthesis

Intermediates condense in organic solvents → crude copper phthalocyanine (already blue)

→

🎨

Pigmentation

Acid dissolution or salt milling → nano-sized, specific crystal form blue pigment

→

🚗

Final Application

Automotive paints, inks, high-performance coatings

💡 Key Takeaway: Crude copper phthalocyanine must undergo special treatments such as acid dissolution or salt milling to transform the originally large and agglomerated particles into nano-sized, specific crystal form blue pigment before it can be used in the manufacture of automotive paints, inks, etc. When you hear "pigment intermediates," understand them as "dye intermediates" specifically used to manufacture pigments — with subsequent processes focusing more on the specific application properties of the pigment (lightfastness, dispersion, crystal form).

Frequently Asked Questions (FAQ)

What is the difference between pigment intermediates and dye intermediates?

Pigment intermediates and dye intermediates are essentially the same aromatic hydrocarbon derivatives. The difference lies not in the intermediate itself, but in the subsequent processing technology and the performance requirements of the final product. Pigment production requires additional steps such as crystal form control, surface treatment, and ultra-fine grinding, while dye production focuses more on solubility and affinity for fibers.

What are the four main types of pigment intermediates?

The four main types are: (1) Benzene-based intermediates — the most widely produced, used for azo pigments; (2) Naphthalene-based intermediates — soluble in alkalis, used for phenolic azo and acidic pigments; (3) Anthraquinone-based intermediates — excellent fastness, used for high-performance pigments; and (4) Heterocyclic and high-performance intermediates — the most complex, used for phthalocyanine, quinacridone, and DPP pigments.

Why is crystal form control so important in pigment production?

Crystal form directly determines the pigment's hue, hiding power, and coloring intensity. For example, phthalocyanine blue exists in both α and β crystal forms, each exhibiting different shades of blue. By controlling the crystal form through specific solvents or heat treatment, manufacturers can precisely tailor the pigment's optical and physical properties for different applications.

What makes heterocyclic intermediates like phthalocyanine preferred for high-end applications?

Heterocyclic intermediates produce pigments with the most complex molecular structures, which translates into top-tier performance including exceptional weather resistance, heat resistance, lightfastness, and chemical stability. These properties make them indispensable for demanding applications such as automotive paints, high-grade inks, and industrial coatings, where long-term color durability is critical.

What is the "pigmentation" process and why is it unique to pigments?

Pigmentation is a post-synthesis treatment unique to pigment manufacturing. After the initial chemical synthesis produces a "filter cake," the crude pigment must undergo crystal form control, surface treatment (with rosin or surfactants to improve dispersibility), and ultra-fine grinding. These steps ensure the pigment achieves the correct particle size, crystal structure, and surface properties needed for optimal performance in paints, inks, and coatings — steps that are not required in dye manufacturing.

How are naphthalene-based intermediates different from benzene-based intermediates in pigment production?

Naphthalene-based intermediates contain a naphthalene ring (two fused benzene rings) and typically include a sulfonic acid group, making them soluble in alkalis. They are primarily used for synthesizing phenolic azo pigments and acidic pigments that produce vibrant colors. Benzene-based intermediates, by contrast, contain a single benzene ring, are the most cost-effective, and are used for the broadest range of azo pigments across the yellow, orange, and red color spectrum with the highest production volumes.