Description

Acid Red 265 is a synthetic, water-soluble azo dye belonging to the acid dye class, known for its bright and vivid red color. This high-performance colorant is valued for its excellent tinctorial strength, good lightfastness, and strong affinity for protein-based and polyamide fibers. It is a critical component for industries requiring durable and vibrant coloration. Key users include textile manufacturers, leather processors, and producers of specialty inks and paper.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing brilliant red shades with good wash fastness.
• Leather Coloring: Used in the dyeing of leather goods, including footwear, apparel, and upholstery, for uniform and deep coloration.
• Ink Manufacturing: A key pigment for formulating inks used in inkjet printing, ballpoint pens, and specialty markers.
• Paper Staining: Employed in the production of colored papers, decorative tissues, and security papers.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Plastics and Polymers: Used for coloring certain types of plastics and synthetic materials where acid dye compatibility exists.

Basic Information

Product Name	Acid Red 265
CAS No.	6358-43-6
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Red 265; C.I. 18129; Acid Leather Red G; Nylosan Red F-3GL; Telon Red F3GL; Acid Fast Red A; Acid Brilliant Red 3GL; 2,7-Naphthalenedisulfonic acid, 5-[(4-chloro-2-nitrophenyl)azo]-4-hydroxy-3-[(2-methylphenyl)azo]-, disodium salt
EINECS	228-782-1

Quality Control

Our Acid Red 265 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against stringent in-house specifications for critical parameters such as color strength, shade, solubility, and impurity profile. While this product is typically supplied to industrial grade standards, we can provide material compliant with specific buyer requirements. A Certificate of Analysis (COA) detailing purity, physical properties, and performance tests is 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 incompatible materials and sources of ignition. The product is light-sensitive and should be stored away from direct light exposure to maintain color stability.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 50 ppm

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