Description

Direct Blue 201 is a synthetic, high-strength direct dye belonging to the azo chemical class, widely recognized for its excellent affinity to cellulosic fibers. Its primary value lies in delivering deep, vibrant blue shades with good wash and light fastness properties, making it a cost-effective solution for industrial dyeing. This product is essential for manufacturers in the textile industry, particularly for dyeing cotton, viscose, and paper, where consistent color yield and batch-to-batch uniformity are critical.

Application

• Primary dyeing of cotton and other cellulosic fibers in textile manufacturing.
• Coloration of viscose rayon and blended fabrics.
• Dyeing of paper and paperboard for packaging and specialty products.
• Used in the production of leather for uniform blue shades.
• Potential use as a colorant for wood staining and other non-textile substrates.
• Employed in research and development laboratories for analytical staining and process studies.

Basic Information

Product Name	Direct Blue 201
CAS No.	60800-55-7
Molecular Formula	C40H23N7Na4O13S4
Molecular Weight	~1029.89 g/mol
Synonyms	Direct Blue 201; C.I. Direct Blue 201; Direct Blue 2B; Pontamine Blue 2B; Aizen Direct Blue 2BH; Atul Direct Blue 2B; Direct Blue 2BH; Direct Navy Blue 2B
EINECS	Contact for details

Quality Control

Our Direct Blue 201 is manufactured under a stringent quality management system to ensure consistent purity and performance. Every batch is tested against key parameters including color strength, shade, solubility, and impurity profile to meet the demanding requirements of industrial dyeing processes. A Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee traceability and compliance with your specifications.

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 incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark Blue to Bluish-Black Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade on Cotton	Conforms to Standard
Fastness Properties	Contact for details

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