Description

Fast Red B Salt is a diazonium salt primarily used as a coupling component in the synthesis of azo dyes and pigments. This compound is valued for its ability to produce vibrant, lightfast red and scarlet hues in various materials. It is an essential intermediate for manufacturers in the textile, leather, ink, and specialty chemical industries seeking consistent color performance.

Application

• Azo Dye & Pigment Synthesis: A key coupling agent for producing high-performance red and scarlet azo dyes and organic pigments.
• Textile Dyeing & Printing: Used in the formulation of dyes for coloring natural and synthetic fibers, including cotton and polyester blends.
• Leather Finishing: Employed in dye systems to achieve deep, uniform red colors on leather goods.
• Ink Manufacturing: A component in the production of inks for packaging, publications, and specialty printing applications.
• Paper Coloring: Utilized in the manufacture of colored papers and paper products requiring specific red shades.
• Biological Staining: Acts as a chromogen in histology and cytology for staining tissues in diagnostic applications.
• Chemical Research: Serves as a reagent and intermediate in organic synthesis and analytical chemistry research.

Basic Information

Product Name	Fast Red B Salt
CAS No.	27761-26-8
Molecular Formula	C14H14N4O4S
Molecular Weight	334.35 g/mol
Synonyms	Fast Red B Base; 5-Nitro-2-aminoanisole Diazonium Salt; 2-Methoxy-5-nitroaniline Diazonium Salt; 2-Amino-1-methoxy-4-nitrobenzene Diazonium Salt; Diazo Fast Red B; C.I. 37125; Azoic Diazo Component 5; Fast Red Salt B
EINECS	248-596-8

Quality Control

Our Fast Red B Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation (IR), to ensure it meets precise chemical specifications. Certificates of Analysis (COA) documenting batch-specific results are provided to guarantee supply consistency and reliability for your production processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is easily oxidized and should be kept under an inert atmosphere where practical. Keep away from heat, sparks, and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to light brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Moisture Content	≤ 2.0%
Insoluble Matter	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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