Description

C.I. Direct Red 112 is a high-performance, water-soluble disazo direct dye renowned for its strong affinity to cellulosic fibers. This compound is a critical component for achieving vibrant, wash-fast red shades in industrial textile dyeing and paper coloration processes. It is essential for manufacturers in the textile, paper, leather, and ink industries seeking reliable and consistent colorants for bulk production.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fabrics to produce deep red hues with good light and wash fastness.
• Paper Coloration: Used in the mass tinting of paper products, including packaging materials, tissues, and specialty papers.
• Leather Finishing: Imparts color to leather goods in the tanning industry.
• Ink Manufacturing: Serves as a colorant for certain types of inks, including stamp pad and flexographic inks.
• Biological Staining: Employed in histology and microbiology as a staining agent for tissue samples.
• Educational & Research: Used in laboratories for chemical demonstrations and research purposes.

Basic Information

Product Name	C.I. Direct Red 112
CAS No.	12262-21-4
Molecular Formula	C₃₅H₂₅N₇Na₂O₁₀S₂
Molecular Weight	837.73 g/mol
Synonyms	Direct Red 112; Pontamine Fast Red 8BL; Direct Fast Red 8BL; Sirius Red 8BL; C.I. 29160; Diazol Fast Red 8BL; Atul Direct Fast Red 8BL; Benzo Fast Red 8BL; Solophenyl Red 8BL (historical); 3,3'-((3,3'-Dimethoxy-(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(4-amino-1-naphthalenesulfonic acid) disodium salt
EINECS	235-536-8

Quality Control

Our C.I. Direct Red 112 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for shade, strength, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to guarantee consistency and compliance with your application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and 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 to brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Shade	Conforms to standard
Strength	100 ± 3%
Moisture Content	Max. 5.0%
Water Insolubles	Max. 0.5%
pH (1% Solution)	6.0 - 8.0
Light Fastness	Moderate to Good
Wash Fastness	Good

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