Description

Fast Brown Salt Va CAS NO 61813-55-6 is a specialized diazonium salt intermediate, a critical component in the synthesis of azo dyes and pigments. Its primary value lies in enabling the production of high-performance, light-fast brown colorants essential for demanding industrial applications. This product is specifically engineered for manufacturers in the textile, leather, and specialty ink industries who require consistent, high-purity intermediates for reliable coloration processes.

Application

• Primary intermediate for the synthesis of azo-based brown dyes and pigments.
• Key component in coloration processes for textile fibers, including cotton, wool, and synthetics.
• Manufacturing of colorants for leather finishing and dyeing.
• Production of pigments for industrial and specialty printing inks.
• Used in the formulation of colorants for paper and packaging materials.
• Potential applications in the coloration of plastics and polymers.

Basic Information

Item	Details
Product Name	Fast Brown Salt Va
CAS No.	61813-55-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Fast Brown Salt VA; Diazonium Salt VA; Azoic Coupling Component VA; Fast Brown VA Salt; C.I. Azoic Diazo Component; Brown Diazonium Salt; 2,5-Dichloroaniline Diazonium Salt (derivative); Variamine Blue B Salt (related compound)
EINECS	Contact for details

Quality Control

Our Fast Brown Salt Va is produced under a stringent quality management system to ensure batch-to-batch consistency and reliability. The product undergoes rigorous analytical testing, including chromatography and spectrophotometric methods, to verify identity, purity, and performance characteristics. A Certificate of Analysis (COA) detailing specific lot results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Light to dark brown powder or crystalline solid
Identification (IR)	Conforms to standard
Assay (Diazonium Content)	Min. 95%
Moisture Content	Max. 2.0%
Insoluble Matter	Max. 0.5%
Coupling Strength	Conforms to reference standard

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