Pigment Yellow 12

Pigment Yellow 12, also named Benzidine Yellow G (PY12), is semi-transparent pigment. It has low viscosity, excellent light fastness, good dispersibility and good storage stability. , Pigment Yellow 12 also has high fluidity in some formulations, and it has no fluorescence. In different applications, high transparency and high opacity can be achieved. It also has reddish yellow type and and greenish light yellow type to meet different shade requirements.

Product Details

Basic information of Pigment Yellow 12:

Color Index No: Pigment Yellow 12(C.I.21090)

Synonyms:2,2′-[(3,3′-dichlorobiphenyl-4,4′-diyl)di(E)diazene-2,1-diyl]bis(3-oxo-N-phenylbutanamide)
(2E,2’E)-2,2′-[(3,3′-dichlorobiphenyl-4,4′-diyl)di(1E)hydrazin-2-yl-1-ylidene]bis(3-oxo-N-phenylbutanamide)
2-[2-chloro-4-[3-chloro-4-[2-oxo-1-(phenylcarbamoyl)propyl]azo-phenyl]phenyl]azo-3-oxo-N-phenyl-butanamide;

Molecular Structure:

Pigment Yellow 12 molecular

Molecular Fomula:C32H26CI2N6O4 Molecular Weight:629.493
CAS No:6358-85-6 EINECS No:228-787-8
Density(g/cm3):1.40 Average particle size:0.1-0.21um
Specific surface(m2/g):21.63 Oil Absorption(g/100g):25-80
Melting point:312-320℃ Chemical Class:Diarylide Yellow

Chemical resistance datas:

Light fastness (Full) : 3-5 Light fastness(Tinting) : 3-4
Weather:2-3 Water :  5
Ethanol : 4-5 Heat stability (10min) : 180℃
Ethyl acetate : 3-4 Acid : 5
Alkali : 5 White spirit : 3

Feature of Pigment Yellow 12:

  1. Pigment Yellow12 is light yellow powder
  2. Pigment Yellow 12 isslightly soluble in ethanoland not soluble in water.
  3. In concentrated nitric acid, Pigment Yellow 12 is brownish yellow, and in sulphuric acid, it is reddish orange.
  4. Pigment Yellow 12is aninsoluble bis-dichloro-type pigment. It has excellent solvent resistance and strong coloring power and. But comparing with monoazo pigments, its light resistance is not as good .
  5. The heat resistanceof Pigment Yellow 12 remains stable at 150°C.
  6. The solvent resistance of pigment yellow 12 is very good, including solvents like:xylene;ethanol; acetone; cellosolve; nitrocellulose solvent; its alkali and acid resistance is also very good.

Application of Pigment Yellow 12 :

Heat-set ink,Cold set ink,UV curing ink(offset and flexo), NC ink, water-based ink, silkscreen ink; textile printing;PE,PP,PVC,Rubber

Tags: Pigment Yellow 

What is the chemical make-up of Pigment Yellow?

“Pigment Yellow” refers to a group of synthetic organic pigments that share a yellow color. The specific chemical make-up of Pigment Yellow can vary depending on the particular pigment in this category.

Pigments are often complex organic compounds with distinct chemical structures. Commonly used Pigment Yellow types include diarylide yellows, azo yellows, and isoindolinone yellows. Each type has a unique chemical composition, typically involving carbon, hydrogen, nitrogen, and oxygen atoms.

The choice of Pigment Yellow depends on its intended application, such as in paints, inks, plastics, or other materials, as different formulations offer specific color properties and performance characteristics.

How is Pigment Yellow produced?

Pigment Yellow is produced through a synthetic process involving chemical reactions to create organic compounds with yellow color properties. The specific method can vary based on the type of Pigment Yellow being produced, as there are different chemical formulations within this category.

The synthesis begins with the selection of starting materials, often involving aromatic compounds containing carbon, hydrogen, nitrogen, and oxygen.

For many yellow pigments, especially azo pigments, a key step involves the reaction between diazonium salts and coupling components. In the case of yellow azo pigments, coupling agents like phenols or naphthols are commonly used. This reaction forms the azo bond (―N=N―), contributing to the color.

The reaction mixture is often subjected to precipitation or crystallization to isolate the pigment. This step helps remove impurities and concentrate the pigment.

The precipitated or crystallized pigment is washed to remove by-products, unreacted starting materials, and other impurities.

The purified pigment is dried to obtain a solid, powdered form suitable for use in various applications.

In some cases, the dried pigment is subjected to milling or micronization processes to achieve a desired particle size. This influences the pigment’s dispersibility and application characteristics.

Depending on the intended application, the pigment particles may undergo surface treatment to improve compatibility with specific media, enhance dispersion, or provide additional performance features.

pigment yellow 180

What types of materials are used for Pigment Yellow?

These materials are generally available:

Azo Compounds

Diarylide Yellows

Isoindolinone Yellows

Benzimidazolone Yellows

Nickel Complexes

These materials are carefully selected and synthesized to create Pigment Yellow with diverse properties, ensuring suitability for various applications such as paints, inks, plastics, and textiles. The choice of material depends on factors like color characteristics, lightfastness, chemical stability, and intended use in different industries.

How is Pigment Yellow stored and used?

For storage and use, HENGYI TECHNOLOGY provides you with these suggestions:

Pigment Yellow is typically stored at temperatures below 45°F in airtight and waterproof containers to prevent it from losing moisture and becoming brittle. It is used mainly in paints, dyes, and printing inks, as well as in plastics, rubber, and synthetic fibers. It is also used to color concrete, ceramics, and glass.