Description

Variamine Blue B Diazonium Salt is a specialized organic intermediate primarily used as a coupling agent in the synthesis of azo dyes and pigments. Its significance lies in its ability to form stable, intensely colored compounds, making it a critical component for producing high-performance colorants. This product is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop vivid blues and other shades with excellent fastness properties. The compound is supplied as a stabilized salt, ready for diazotization and subsequent coupling reactions.

Application

• Primary coupling component for the synthesis of azo dyes, particularly for cotton and other cellulose fibers.
• Manufacture of pigments and colorants used in printing inks for packaging and publications.
• Production of specialty dyes for leather finishing and paper coloration.
• Key intermediate in the development of functional dyes for non-textile applications, such as in liquid crystal displays (LCDs).
• Used in research and development laboratories for creating novel chromophores and studying azo coupling mechanisms.
• Potential use in the formulation of colorimetric indicators and sensors in analytical chemistry.

Basic Information

Product Name	Variamine Blue B Diazonium Salt
CAS No.	6254-98-4
Molecular Formula	C13H12N3O3S
Molecular Weight	290.32 g/mol
Synonyms	4-Amino-2,5-diethoxybenzanilide Diazonium Salt; Variamine Blue B Salt; Fast Blue B Salt; Diazo Fast Blue B; C.I. 37240; 2,5-Diethoxy-4-[(4-methoxyphenyl)amino]benzenediazonium Hydrogen Sulfate; 4-Benzoylamino-2,5-diethoxybenzenediazonium Sulfate
EINECS	228-396-4

Quality Control

Our Variamine Blue B Diazonium Salt is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high reactivity. Each lot is tested to confirm identity, purity, and suitability for diazo coupling reactions. A comprehensive Certificate of Analysis (COA) is provided with each shipment, detailing key parameters such as assay, moisture content, and insolubles. We adhere to ISO 9001 quality management standards, and our production processes are designed to meet the stringent requirements of industrial dye and pigment synthesis.

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). This material is strictly light-sensitive and hygroscopic (moisture-sensitive). It must be protected from all light exposure and stored under conditions that prevent absorption of atmospheric moisture to maintain stability and reactivity. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Light beige to tan powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Water Content (KF)	Max. 3.0%
Insolubles in Water	Max. 0.5%
pH (1% Solution)	2.0 - 4.0

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