Description

Disperse Red 221 is a high-performance, anthraquinone-based disperse dye known for its excellent color fastness and thermal stability. It is a critical component for achieving vibrant and durable red shades on synthetic fibers, particularly in demanding high-temperature dyeing processes. This product is essential for manufacturers in the textile and specialty plastics industries seeking reliable and consistent coloration.

Application

• Primary dyeing of polyester (PET) fibers and fabrics for apparel and home textiles.
• Dyeing of polyamide (nylon) fibers, often in combination with other dyes for specific shade requirements.
• Coloration of acetate and triacetate fibers for specialized fabric applications.
• Mass coloration (spin dyeing) of synthetic polymers and engineering plastics during the manufacturing process.
• Used in the formulation of inks for transfer printing on synthetic textiles.
• Potential application as a colorant for specialty coatings and non-textile substrates.

Basic Information

Product Name	Disperse Red 221
CAS No.	64426-35-3
Molecular Formula	C20H13NO4
Molecular Weight	331.32 g/mol
Synonyms	1-Amino-4-hydroxy-2-phenoxy-9,10-anthracenedione; C.I. Disperse Red 221; Disperse Red 221; Disperse Red SE-4B; Samaron Red F3BS; Foron Red SE-4B; Dianix Red F3B-E; Kayalon Polyester Red F3B-E; Palanil Red F3B; Terasil Red W-4B; 9,10-Anthracenedione, 1-amino-4-hydroxy-2-phenoxy-
EINECS	Contact for details

Quality Control

Our Disperse Red 221 is manufactured under a strict quality management system to ensure batch-to-batch consistency. Each lot is tested for critical parameters including color strength, shade, dispersion stability, and particle size distribution to meet the rigorous demands of industrial dyeing. A Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics 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. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Dark red powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Purity (HPLC)	≥ 98.0%
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Dispersion Stability	Passes test
Particle Size	> 95% passes 80 mesh

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