Description

Disperse Red 191 is a high-performance synthetic dye belonging to the disperse dye class, widely recognized for its vibrant red hue and excellent fastness properties. Its primary value lies in delivering consistent, high-quality coloration with strong wash and light fastness, which is critical for demanding textile applications. This product is essential for manufacturers in the polyester and acetate fiber industries seeking reliable and efficient dyeing solutions. The compound is also identified by the CAS registry number 103657-51-8.

Application

• Primary dyeing of polyester fibers and fabrics.
• Dyeing of cellulose acetate and triacetate textiles.
• High-temperature pressure dyeing processes for synthetic fibers.
• Continuous thermosol dyeing for polyester/cotton blends.
• Printing applications on polyester-based materials.
• Coloration of plastic resins, particularly for specialty applications.

Basic Information

Product Name	Disperse Red 191
CAS No.	103657-51-8
Molecular Formula	C20H17N5O6
Molecular Weight	423.38 g/mol
Synonyms	Disperse Red 191; C.I. Disperse Red 191; 1-Amino-4-hydroxy-2-phenoxy-9,10-anthracenedione; 1-Amino-4-hydroxy-2-phenoxyanthraquinone; Disperse Red SE-4B; Samaron Red HBL; Foron Red S-BWFL; Dianix Red AC-E; Kayalon Polyester Red BL-SE
EINECS	Contact for details

Quality Control

Our Disperse Red 191 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Quality is verified through comprehensive testing including HPLC for purity, spectrophotometry for color strength, and assessments of fastness properties. A Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to guarantee compliance with your technical requirements.

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 strong oxidizing agents and incompatible materials. The product is light-sensitive; prolonged exposure to direct light should be avoided to maintain color integrity.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	≥ 100% (Standard)
Purity (HPLC)	≥ 98.0%
Moisture Content	≤ 1.0%
Ash Content	≤ 0.5%
Dispersion Stability	Passes test
Particle Size	≤ 2 μm (Typical)

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