Description

Acid Red 361 is a synthetic, water-soluble azo dye belonging to the acid dye class, valued for its bright and vibrant red color. It is a critical component for imparting durable coloration to substrates with cationic sites, particularly protein-based fibers like wool, silk, and nylon. This dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality red shades with good fastness properties. The compound is supplied as a high-purity powder to ensure reliable performance in demanding industrial applications.

Application

• Primary dyeing and printing of wool, silk, and nylon textiles.
• Coloration of leather goods, including footwear, apparel, and accessories.
• Production of colored paper and specialty paper products.
• Ink formulation for inks used in various marking and writing instruments.
• Dyeing of feathers and other protein-based materials.
• As a colorant in the manufacture of certain cosmetic products where applicable under regulatory guidelines.

Basic Information

Product Name	Acid Red 361
CAS No.	39724-61-3
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Red 361; C.I. Acid Red 361; Acid Leather Red G; Acid Brilliant Red G; Nylosan Red F-G; Telon Red F-G; Lanasyn Red S-G; Supranol Red GW; Acid Fast Red G; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-2-[(2-hydroxy-1-naphthalenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-methylphenyl)azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our Acid Red 361 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. The product undergoes comprehensive analytical testing, including spectrophotometric analysis for color strength and purity, and chromatography to monitor impurity profiles. A Certificate of Analysis (COA) detailing specific results for each batch is provided to guarantee compliance with agreed specifications and industry standards.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Shade	Conforms to standard
Fastness Properties	As per technical data sheet

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