Description

Disperse Blue 291 is a high-performance synthetic dye belonging to the anthraquinone class, widely recognized for its excellent color fastness and thermal stability. This product is essential for achieving deep, vibrant blue shades with superior wash and light resistance in synthetic polymer substrates. It is primarily required by manufacturers in the textile and plastics industries for dyeing polyester, nylon, and acetate fibers, as well as for mass coloration of plastics and resins.

Application

• Primary dyeing of polyester fibers and fabrics for apparel and home textiles.
• Dyeing of nylon and acetate fibers for specialized textile applications.
• Mass coloration (spin dyeing) of polyester chips, nylon resins, and other synthetic polymers.
• Coloration of engineering plastics for automotive components and consumer goods.
• Printing inks for synthetic fabrics and transfer papers.
• Specialty applications requiring dyes with high sublimation fastness.

Basic Information

Product Name	Disperse Blue 291
CAS No.	56548-64-2
Molecular Formula	C20H17BrN4O5
Molecular Weight	473.28 g/mol
Synonyms	Disperse Blue 291; C.I. Disperse Blue 291; 1-Amino-4-(3-bromo-4-methylphenyl)amino-9,10-dihydro-9,10-dioxoanthracene-2-carboxylic acid methyl ester; 1-Amino-4-[(3-bromo-4-methylphenyl)amino]-9,10-dihydro-9,10-dioxo-2-anthracenecarboxylic acid methyl ester; Disperse Navy Blue S-2GL; Foron Navy S-2GL; Samaron Navy HFRL; Dianix Navy Blue N
EINECS	Contact for details

Quality Control

Our Disperse Blue 291 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, dispersion stability, and particle size distribution. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application performance is provided with each shipment 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). Keep away from heat sources and incompatible materials. The product is light-sensitive and should be stored away from direct light exposure to maintain its coloristic properties.

Specification

Item	Specification
Appearance	Dark Blue 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%
Particle Size (≥ 2μm)	≤ 5.0%
Dispersion Stability	Stable

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