Description

Coomassie Fast Black G is a high-purity, synthetic diazo dye widely recognized for its intense color and excellent fastness properties. This product is essential for achieving consistent, high-quality coloration in demanding industrial applications where durability and performance are critical. It serves as a key component for manufacturers in the textile, leather, and specialty paper industries seeking reliable and efficient dyeing solutions.

Application

• Textile Dyeing: Primarily used for dyeing natural and synthetic fibers, including cotton, wool, and polyamide, offering good wash and light fastness.
• Leather Finishing: Employed in the coloration of leather goods, providing deep, uniform shades with good rub resistance.
• Paper Staining: Utilized for the production of colored papers, specialty packaging, and decorative materials.
• Biological Staining (Histology): Acts as a component in specific staining protocols for microscopic tissue analysis in research and diagnostics.
• Ink Formulation: Incorporated into the manufacture of industrial inks for printing and marking applications.
• Plastics and Polymers: Used for mass coloration of certain plastics to achieve specific aesthetic effects.

Basic Information

Product Name	Coomassie Fast Black G
CAS No.	10142-78-6
Molecular Formula	C34H24N6Na4O14S4
Molecular Weight	992.80 g/mol
Synonyms	Acid Black 107; C.I. 26370; Coomassie Black G; Fast Black G; Diazo Black G; Leather Black G; Acid Leather Black G; Paper Black G
EINECS	233-389-9

Quality Control

Our Coomassie Fast Black G is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high performance. Each lot is tested against rigorous internal specifications for key parameters such as color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark Blue to Black Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.