Description

Acid Red 425 is a synthetic, high-performance acid dye known for its vibrant red color and excellent fastness properties. It is a critical component for achieving durable and brilliant coloration in a variety of industrial substrates. This dye is primarily utilized by manufacturers in the textile, leather, and paper industries, where consistent quality and reliable performance are paramount for commercial success.

Application

• Textile Dyeing: Primary application for dyeing polyamide (nylon) fibers, wool, and silk, offering good wash and light fastness.
• Leather Finishing: Used for coloring leather goods, providing uniform and deep shades with good rub fastness.
• Paper Coloration: Employed in the production of specialty colored papers, including decorative and packaging materials.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• 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 where acid dye compatibility exists.

Basic Information

Product Name	Acid Red 425
CAS No.	151499-54-6
Molecular Formula	C24H20N4Na2O8S2
Molecular Weight	630.55 g/mol
Synonyms	Acid Red 425; C.I. Acid Red 425; Acid Leather Red 425; Nylosan Red E-BL; Telon Red K-BLS; Supranol Red BL; Erionyl Red A-2B; Acid Fast Red A; 2,7-Naphthalenedisulfonic acid, 5-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-3-[(4-sulfophenyl)azo]-4-hydroxy-, sodium salt (1:2)
EINECS	Contact for details

Quality Control

Our Acid Red 425 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 profiles. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to support your quality assurance protocols.

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 incompatible materials. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Ash Content	Max. 1.0%

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