Description

Direct Blue 229 is a synthetic, high-performance disazo direct dye widely used for its excellent substantivity to cellulosic fibers. This dye is valued for its ability to produce deep, vibrant blue shades with good overall fastness properties, particularly in industrial dyeing processes. It is a critical component for textile manufacturers, paper colorants, and leather tanneries requiring consistent, high-quality coloration.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers in exhaust and continuous dyeing processes.
• Paper Coloring: Used in the mass coloration of paper and paperboard to achieve uniform blue hues.
• Leather Finishing: Employed in the dyeing of leather goods, providing rich color penetration.
• Ink Formulation: A colorant component in certain types of inks for specialized printing applications.
• Blend Dyeing: Suitable for dyeing cellulosic components in fiber blends with polyester or nylon.

Basic Information

Product Name	Direct Blue 229
CAS No.	12270-35-8
Molecular Formula	C40H23N7O13S3.3Na
Molecular Weight	~ 992 g/mol (Free Acid)
Synonyms	Direct Blue 229; C.I. Direct Blue 229; Direct Blue 2B; Direct Blue B2RL; Amanil Blue 2B; Atul Direct Blue 2B; Dinamine Blue 2B; Direct Blue 2B (VAN); Direct Blue B2R; Direct Blue BRL; Direct Blue FBL; Direct Fast Blue 2B; Sirius Blue 2B; Solamine Blue 2B; Solar Blue 2B
EINECS	Contact for details

Quality Control

Our Direct Blue 229 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application test results 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 strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark Blue to Bluish-Black Powder
Identification	Conforms (IR / HPLC)
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
Fastness Properties (Typical)	Light: 4-5; Wash: 3-4; Water: 3-4

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