Description

Fast Black Salt G is a high-purity diazonium salt primarily used as a key coupling component in the synthesis of azo dyes and pigments. This compound is essential for producing deep, intense black shades with excellent fastness properties on various substrates. It is a critical intermediate for manufacturers in the textile, leather, ink, and specialty chemical industries seeking reliable and consistent colorant performance.

Application

• Primary intermediate for the synthesis of azo black dyes and pigments.
• Coupling agent in the production of textile dyes for cotton, nylon, and polyester.
• Manufacturing of leather dyes for uniform and durable coloration.
• Key component in formulating printing inks, especially for packaging and publications.
• Used in the synthesis of paper colorants and specialty coatings.
• Intermediate for research and development of novel high-performance pigments (HPP).
• Potential use in the preparation of dye-based reagents for analytical chemistry.

Basic Information

Product Name	Fast Black Salt G
CAS No.	30927-98-1
Molecular Formula	C12H9Cl2N3O2
Molecular Weight	298.13 g/mol
Synonyms	Fast Black G Salt; 2,5-Dichloro-4-(4-nitrophenylazo)phenyldiazonium Chloride Zinc Chloride Double Salt; 2,5-Dichloro-4-[(4-nitrophenyl)azo]benzenediazonium Chloride Zinc Chloride Double Salt; C.I. 37210; Diazo Fast Black G; Fast Black G Base Diazonium Salt; Azoic Diazo Component 45; Fast Black Salt K
EINECS	Contact for details

Quality Control

Our Fast Black Salt G is manufactured under a strict quality management system to ensure batch-to-batch consistency and high chemical purity. The product undergoes rigorous analytical testing, including HPLC for assay and impurity profiling. A Certificate of Analysis (COA) detailing purity, identity, and other critical parameters is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed and away from direct light sources to maintain stability and performance.

Specification

Item	Specification
Appearance	Brownish powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 2.0%
Solubility	Soluble in polar organic solvents

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