Description

Disperse Red 343 is a high-performance synthetic organic dye belonging to the disperse dye class, primarily used for coloring synthetic fibers. Its value lies in its excellent color fastness properties, including good lightfastness and wash fastness, which are critical for durable textile applications. This product is essential for manufacturers in the textile and polymer industries seeking reliable and vibrant red colorants for polyester, acetate, and nylon fibers.

Application

• Primary dyeing of polyester fibers and fabrics.
• Coloration of cellulose acetate and triacetate materials.
• Printing applications on synthetic textiles.
• Mass coloration of synthetic polymers and plastics.
• Specialized applications in non-textile areas such as inks or coatings for specific substrates.

Basic Information

Product Name	Disperse Red 343
CAS No.	99035-78-6
Molecular Formula	C20H17N5O5
Molecular Weight	407.38 g/mol
Synonyms	Disperse Red 343; C.I. Disperse Red 343; 1-Amino-4-hydroxy-2-phenoxy-9,10-anthracenedione; 1-Amino-4-hydroxy-2-phenoxyanthraquinone; 9,10-Anthracenedione, 1-amino-4-hydroxy-2-phenoxy-; 1-Amino-4-hydroxy-2-phenoxy-9,10-anthraquinone; Disperse Red SE-4B (by some suppliers); Anthraquinone disperse dye (Red 343)
EINECS	Contact for details

Quality Control

Our Disperse Red 343 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive testing including strength, shade, and fastness properties against industry benchmarks. A Certificate of Analysis (COA) detailing purity, physical form, and application performance is provided with 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 heat sources and incompatible materials. As a light-sensitive material, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Purity (HPLC)	≥ 98.0%
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Dyeing Behavior	Conforms to standard shade and fastness

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