Description

Acid Red 374 is a synthetic, water-soluble azo dye belonging to the acid dye class, valued for its bright and vivid red color. It is a critical component for imparting durable and vibrant coloration to materials with cationic sites, particularly polyamide fibers like nylon. This dye is essential for manufacturers in the textile, leather, and specialty paper industries seeking consistent, high-quality red shades with good fastness properties. Acid Red 374, identified by CAS No. 6507-78-4, is supplied as a high-purity powder to meet rigorous industrial application standards.

Application

Acid Red 374 is primarily used for dyeing and printing applications where a strong affinity for protein-based and synthetic polyamide materials is required. Its key applications include:

• Textile Dyeing: Primary application for dyeing nylon (polyamide) fibers, yarns, and fabrics to achieve bright red hues.
• Leather Processing: Used for coloring leather goods, providing rich color penetration and good fastness.
• Paper Coloring: Employed in the production of specialty papers, including decorative and packaging papers.
• Ink Formulation: A colorant component in inks for various marking and printing applications.
• Wood Staining: Used in stains for coloring wood and related materials.
• Biological Staining: Potential use as a histological stain in laboratory settings.

Basic Information

Product Name	Acid Red 374
CAS No.	6507-78-4
Molecular Formula	C32H21N5Na2O8S2
Molecular Weight	713.65 g/mol
Synonyms	Acid Red 374; C.I. Acid Red 374; Nylosan Red F-3GL; Telon Red F3GL; Supranol Red 3GW; Acid Leather Red 3GL; Acid Fast Red A; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-2-[(2-hydroxy-1-naphthalenyl)azo]-5-sulfophenyl]azo]-4-hydroxy-3-[(4-methylphenyl)azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our Acid Red 374 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot undergoes comprehensive analytical testing, including spectrophotometric analysis for strength and shade, HPLC for purity, and assessments of solubility and fastness properties. Certificates of Analysis (COA) documenting all critical parameters are available upon request 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

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

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