Description

Acid Red 426 is a synthetic organic dye belonging to the azo chemical class, valued for its bright and stable red color. It is a critical component for achieving consistent, high-quality coloration in demanding industrial applications. This product is essential for manufacturers in the textile, leather, and specialty ink sectors who require reliable and vibrant red hues.

Application

• Textile Dyeing: Primary application for dyeing nylon, silk, and wool fibers to achieve a bright red shade with good wet fastness.
• Leather Finishing: Used in the coloration of leather goods, providing rich and uniform color penetration.
• Ink Manufacturing: A key pigment for producing specialty inks, including those for ballpoint pens and stamp pads.
• Paper Staining: Employed for tinting paper products where a specific red color is required.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Plastics and Polymers: Can be used for coloring certain types of plastics and synthetic materials.

Basic Information

Product Name	Acid Red 426
CAS No.	118548-20-2
Molecular Formula	C24H20N4Na2O8S2
Molecular Weight	610.55 g/mol
Synonyms	Acid Red 426; C.I. Acid Red 426; Acid Leather Red 426; Acid Nylon Red 426; Sodium 4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2-naphthalenesulfonate; 2-Naphthalenesulfonic acid, 4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-, disodium salt; Acid Fast Red A; Lissamine Red 426
EINECS	Contact for details

Quality Control

Our Acid Red 426 is produced under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot undergoes comprehensive analysis, including purity assay, shade strength, and fastness property testing. Certificates of Analysis (COA) documenting compliance with agreed specifications are available for every shipment.

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.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade and Strength	Within agreed tolerance vs. standard
Fastness Properties	To be specified per application

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