Oil-soluble aniline black, chemically known as Solvent Black 7, is also referred to as oil-soluble black, nigrosine, or alcohol black. It is an azine-type organic dye synthesized from aniline and belongs to the C.I. Solvent Black 7 series. This product appears as a black to blue-black powder, exhibiting exceptional coloring power, superior gloss, and excellent heat and light resistance. As a crucial solvent-type dye, it is widely used in various industrial applications such as plastics, inks, coatings, leather, and rubber.
Physicochemical Properties
Chemical Identifier:
CAS No.: 8005-02-5
Molecular formula: C₂₉H₂₄N₆
Molecular weight: approximately 448.54 g/molEINECS number: 616-851-1
Physical characteristics:
Appearance: Black ultrafine powder with uniform color and high blackness.
Melting point: approximately 275°C.
Density: 1.4 ± 0.1 g/cm³.
Boiling point: approximately 455.6°C.
Dissolution Characteristics:Insoluble in water.
It is easily soluble in organic solvents such as ethanol, toluene, xylene, chloroform, ethyl acetate, turpentine, paraffin, and oils.
A blue precipitate forms in concentrated sulfuric acid and turns blue-black upon exposure to concentrated nitric acid.
Stability:
It exhibits excellent thermal stability and remains resistant to decomposition or discoloration under conventional industrial processing temperatures.It exhibits excellent resistance to acids, alkalis, and sunlight, but may be unstable in environments with strong oxidizing or reducing agents.
Main Application Areas
Oil-soluble aniline black is widely used in the following industries due to its excellent solubility and coloring performance
Plastics Industry:
For coloring plastics such as ABS, PS, and PMMA, particularly suitable for products requiring a high-gloss effect (e.g., electrical appliance casings, toys, and pipes).
It can achieve a mirror-like high-gloss effect, prevent peeling, and has minimal impact on the physical and mechanical properties of plastics.Ink and Printing:
Used for the preparation of oil-based inks, anti-counterfeiting inks, and UV-resistant inks.
Delivers rich, enduring black, ensuring clarity and color saturation in printed materials.
Paint and Coatings:
Applied to automotive topcoat, furniture paint, industrial protective coatings, and insulating paint.Endow the coating with a deep and rich black color, enhancing coverage and decorative appeal.
Leather and Shoe Polish:
It is the mainstream coloring agent for paste and liquid shoe polish, featuring strong coloring power, uniform coloration, and excellent lightfastness.Used for leather dyeing and printing, the oxidation level must be controlled to prevent brittleness.
Other fields:
Pharmaceutical field: Used as a coloring agent for capsule shells and pharmaceutical packaging materials.Coloring for rubber, bakelite, carbon paper, and the electronics industry.
Quality Indicator Reference
Purity: Industrial grade is typically ≥98%, with high purity reaching over 99%.Color intensity: 100% ± 3%.
Heavy metal content: ≤10 ppm.
Execution Standard: HG/T 6084～6085-2022 (China Chemical Industry Standard).
Packing
25kg/fiber drum or iron drum, or as per request.
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