Pigment Red 179

Pigment Red 179 is used in the coloring of automotive coating and refinish, polyvinyl chloride plastics, and fibers. Among the perylene red pigment series, PR179 is one of the pigment with highest business value. For the automotive coating and refinish, it can be mixed together with other organic or inorganic pigment to extend the hue to yellow-red area and meet more application requirements. It also has excellent weather and light fastness, even better than substituted quinacridones. Its heat stability can reach 180-200℃.

Product Details


Pigment Red 179 is an opaque and dark red powder with high performance. It has the biggest consumption among perylene pigments, and is applied in the formulation of automotive coating. It has high coloring strength and excellent heat resistance in PO and PVC. It has good stability and is suitable for the EDPM,PP,PA and PET fiber.

Chemical information

Color Index No:Pigment Red 179

Synonyms: 2,9-dimethylanthra(2,1,9-def:6,5,10-d’e’f’)diisoquinoline-1,3,8,10(2h,9h )-te;anthra(2,1,9-def:6,5,10-d’e’f’)diisoquinoline-1,3,8,10(2h,9h)-tetrone, 2,9-dime;caledon red 2g;  trone;  pigment bordeaux perylene;

Molecular Structure:

Pigment Red 179 molecular

Molecular Fomula:C26H14N2O4 Molecular Weight:418.41
CAS No:5521-31-3 EINECS No: 226-866-1
Density(g/cm3):1.41-1.65 Average particle size:0.07-0.08um
Specific surface(m2/g):52-54 Oil Absorption(g/100g):17-50
Melting point(℃):300 Chemical Class:Perylene

Chemical resistance datas

Light fastness (Full) : 7-8 Light fastness(Tinting) : 7-8
Heat stability :200 ℃ Acid : 5
Alkali : 5 Toluene:5
Ethanol:5 Ethyl acetate:5
Weather:5 Migration:5


Ink Sheetfed offset ink: – Water-based ink: –
Heat set ink: – NC ink: –
Cold set ink: – Metal decorative ink: –
Gravure ink: – UV curing ink(offset): –
Silkscreen ink: – UV curing ink(Flexo): –
Coating Water based industrial paint: – Powder Coatings: –
Solvent based industrial paint: – Automotive coatings: ▲
Water based decorative paint : – Wood coatings: –
Solvent based decorative paint: – Amine curing epoxy coatings: –
Coil Coating: – Textile printing: –
Plastic PE: ◭ PA: –
PP: ◭ PC: –
PVC: ▲ Pom: △
ABS: △ Rubber: △
PUR: ◭ Fibers: ▲

Packing methods

25kgs craft bag with pallets; 7-8MT in 20’FCL

Tags:  Pigment Red

How Does the Chemical Composition of Pigment Red Influence its Color Properties?

Pigments are compounds that absorb light of certain wavelengths and reflect or transmit light of other wavelengths, resulting in a perception of color. The chemical components of pigment red affect its color characteristics.

Chromosomes: Chromosomes are specific atomic groups in pigment molecules that absorb light and cause electronic transitions. The presence of certain chromophores in the chemical structure of pigment red determines its absorption and reflection wavelength range, thereby affecting its color.

Conjugation: The degree of conjugation of the molecular structure of pigment red plays a certain role in its color characteristics. Conjugation includes alternating single and multiple bonds, which can extend the conjugation system. The increase in conjugation usually leads to a shift towards longer wavelengths, thereby affecting the observed color.

Substitution group: Functional groups or substituents attached to pigment molecules can change their color characteristics. Different substituents can change electron density, affect light absorption and reflection, and thus affect perceived color.

Metal complexes: Some pigment red compounds are metal complexes in which the central metal atom coordinates with the surrounding ligand. The types of metals and ligands can affect the color of pigments.

Crystal structure: The crystal structure of pigment red affects the arrangement of solid molecules and the observed color. Crystal modification may produce different tones or tones.

Particle size: The particle size of pigment red particles can affect the color appearance. Compared to larger particles, finer particles may exhibit different optical properties, thereby affecting color intensity.

The combination of these factors leads to the unique color characteristics of pigment red. Chemists and researchers carefully design and modify pigment molecules to achieve specific color characteristics, suitable for various applications in industries such as paint, ink, plastics, and textiles.

Pigment Red 185

How is Pigment Red Produced, and What Manufacturing Processes Are Involved in its Production?

The production of pigment red by Hengyi Technology involves several manufacturing processes, usually starting from raw materials and going through different stages of synthesis and treatment. Although the specific methods may vary depending on specific pigment formulations and required performance, the production process generally involves the following steps:

Raw material selection:

The selection of raw materials is crucial and depends on the specific pigment formula. Common starting materials include aromatic hydrocarbons, aniline, and various chemical precursors.


Usually involves complex chemical reactions. A key step is to synthesize pigment molecules through processes such as condensation, diazotization, and coupling reactions. The selection of reactants and reaction conditions affects the chemical structure and properties of pigments.

Separation and purification:

After synthesis, pigments are usually separated from the reaction mixture and purified to remove impurities and unwanted by-products. Filtration, sedimentation, or other separation techniques can be used.


Dry the separated pigments to remove residual solvents or water. This step is crucial for obtaining a dry and stable pigment powder.


Pigment particles often undergo a grinding process to obtain the desired particle size distribution. Milling can enhance the development of colors, improve dispersion, and ensure uniformity.

Surface treatment:

Surface treatment can be used to alter the properties of pigment particles, such as improving compatibility with specific substrates such as polymers in plastics. Surface treatment can include the application of coatings or chemical modifications.

Quality control:

Implement strict quality control measures throughout the entire production process. Analytical techniques, such as spectroscopy and chromatography, are used to evaluate the chemical composition, purity, and color characteristics of pigments.


The final pigment red product is packaged in various forms, such as powder or dispersion, depending on the intended application.

What Industries Rely Heavily on Pigment Red for Coloring?

Pigment red is widely used in coloring applications in multiple industries. The paint and coating industry is the main consumer of pigment red, which is used in various formulations of decorative and protective coatings.

The printing and ink industry largely relies on pigment red to achieve the vivid and stable color of inks used in various printing applications.

The plastic and polymer industries use pigment red to color various plastic products, including packaging materials, toys, and consumer goods.

The textile industry also incorporates pigment red into the dyeing process of fabrics, ensuring long-lasting and vibrant dyeing.

In addition, pigment red is widely used in the production of color masterbatches, providing a convenient way to introduce color into plastic products during the manufacturing process.