Description

Fast Violet B Salt is a high-purity diazonium salt primarily used as a coupling agent in the synthesis of azo dyes and pigments. This compound is valued for its ability to produce vibrant violet and blue shades with excellent fastness properties. It is a critical intermediate for manufacturers in the textile, leather, ink, and specialty chemical industries seeking consistent color performance.

Application

• Azo Dye Synthesis: Primary coupling component for producing violet and blue azo dyes used in textile and leather dyeing.
• Pigment Manufacturing: Key intermediate in the production of high-performance organic pigments for inks, paints, and plastics.
• Biological Staining: Used in histology and cytology for specific staining applications in diagnostic laboratories.
• Chemical Research: Valuable reagent in organic synthesis and materials science research for introducing diazonium functional groups.
• Paper Coloring: Employed in the manufacture of specialty colored papers and coatings.
• Analytical Chemistry: Serves as a chromogenic agent in certain colorimetric detection methods.

Basic Information

Product Name	Fast Violet B Salt
CAS No.	13983-15-8
Molecular Formula	C13H12ClN3O3·ZnCl2
Molecular Weight	475.90 g/mol (as double salt)
Synonyms	Fast Violet B Base Diazo Salt; Variamine Blue B Salt; 4-Methoxy-4'-aminodiphenylamine Diazonium Salt Zinc Chloride Double Salt; C.I. 37175; Diazo Fast Blue VB; Azoic Diazo Component 48; p-Methoxy-p'-amino-diphenylamine Diazonium Chloride Zinc Chloride Double Salt
EINECS	237-778-9

Quality Control

Our Fast Violet B Salt is manufactured under strict quality management systems to ensure batch-to-batch consistency and high chemical purity. The product undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling. A Certificate of Analysis (COA) detailing purity, identity, and physical specifications is provided with each shipment to guarantee it meets the stringent requirements of industrial and laboratory applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic and strictly light-sensitive nature, the container must be kept tightly sealed immediately after use to prevent moisture absorption and decomposition. Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	Light beige to tan powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility	Soluble in water, acetone; slightly soluble in ethanol
Heavy Metals (as Pb)	≤ 20 ppm

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