Description

C.I. Basic Red 36 is a synthetic cationic dye belonging to the azo chemical class, identified by CAS NO 12221-60-2. This compound is valued for its strong, vibrant red color and excellent substantivity to polyacrylonitrile and other cationic dyeable fibers. It is a critical component for industrial operations requiring consistent, high-intensity coloration. Primary users include manufacturers in the textile, paper, leather, and specialty ink industries.

Application

• Textile Dyeing: Primary application for dyeing acrylic, modacrylic, and cationic dyeable polyester fibers to achieve bright red shades.
• Paper Coloring: Used in the production of colored papers, tissues, and paperboard where a strong red hue is required.
• Leather Finishing: Employed in the dyeing of leather goods, providing rich and uniform color penetration.
• Ink Manufacturing: A key pigment for creating specialty inks, including those for security printing and flexographic applications.
• Biological Staining: Utilized in histology and microbiology as a staining agent for microscopic analysis.
• Plastics and Polymers: Incorporated for mass coloration of certain plastics and resins.

Basic Information

Product Name	C.I. Basic Red 36
CAS No.	12221-60-2
Molecular Formula	C21H21ClN6O3S
Molecular Weight	496.95 g/mol
Synonyms	Basic Red 36; Aizen Cathilon Red GTLH; Astrazon Red GTL; Maxilon Red GRL; Cationic Red GTL; 1,3-Benzenedicarboxamide, N1,N3-bis[4-[(2-chloro-4-nitrophenyl)azo]phenyl]-; C.I. 11085; Basic Red 36 (C.I. 11085)
EINECS	235-402-5

Quality Control

Our C.I. Basic Red 36 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against rigorous internal specifications for color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to guarantee it meets the specific requirements of your application.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient 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)
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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