Description

Astrazon Brilliant Red 4G is a synthetic cationic (basic) dye belonging to the azo chemical class, identified by CAS NO 12217-48-0. It is valued for its brilliant red hue, excellent tinctorial strength, and good affinity for polyacrylonitrile and other modified acrylic fibers. This dye is essential for manufacturers and processors requiring vibrant, wash-fast coloration for technical textiles and specialty papers. Its primary applications are found in the textile, paper, and leather industries, where consistent color quality is critical.

Application

• Acrylic Fiber Dyeing: Primary application for dyeing polyacrylonitrile (PAN, acrylic) and modacrylic fibers to achieve brilliant red shades with good light and wash fastness.
• Paper Coloration: Used in the surface coloring and coating of specialty papers, including decorative and security papers.
• Leather Finishing: Imparts vibrant red colors to leather goods in the finishing stages of production.
• Ink Formulation: A colorant component for certain types of inks, including those for textiles and plastics.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its cationic nature.
• Plastics and Polymers: Can be used for mass coloration of certain cationic-dyeable plastics and polymers.

Basic Information

Product Name	Astrazon Brilliant Red 4G
CAS No.	12217-48-0
Molecular Formula	C23H26N4O3S+ • Cl-
Molecular Weight	473.99 g/mol (for chloride salt)
Synonyms	Basic Red 46; C.I. 110825; Aizen Cathilon Brilliant Red 4GH; Maxilon Red 4G; Sandocryl Red B-4G; Sevron Brilliant Red 4G; Astrazon Red 4G; Cationic Red 4G; 1H-Indolium, 2-[2-[4-(diethylamino)phenyl]ethenyl]-3,3-dimethyl-, chloride; 2-[2-[4-(Diethylamino)phenyl]ethenyl]-3,3-dimethyl-1H-indolium chloride
EINECS	Contact for details

Quality Control

Our Astrazon Brilliant Red 4G is produced under a stringent quality management system. Every batch is tested to ensure consistent shade, strength, and purity, meeting the specifications required for industrial dyeing applications. A comprehensive Certificate of Analysis (COA) detailing parameters such as color strength, solubility, shade, and impurity content is provided with each shipment to guarantee reliable performance in your process.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark red powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Shade	Conforms to standard
Solubility	Freely soluble in water and acetic acid

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