Description

C.I. Direct Blue 189 is a synthetic, water-soluble direct dye belonging to the azo chemical class, identified by CAS NO 61814-79-7. It is valued for its strong affinity to cellulosic fibers, providing deep, vibrant blue shades with good wash and light fastness properties. This dye is essential for manufacturers in the textile industry seeking efficient and consistent coloration for cotton, viscose, and other natural fibers.

Application

• Primary dyeing of cotton, viscose rayon, and other cellulosic textiles.
• Coloration of paper and paperboard for packaging and specialty products.
• Dyeing of leather to achieve uniform blue hues.
• Tinting of soaps and detergents.
• Manufacturing of inks for various printing applications.
• Coloration of wood and bamboo products.

Basic Information

Product Name	C.I. Direct Blue 189
CAS No.	61814-79-7
Molecular Formula	C34H24N7Na3O13S3
Molecular Weight	959.80 g/mol
Synonyms	Direct Blue 189; Direct Blue 189 (C.I.); Direct Blue 189, disodium salt; Direct Blue 2B; Direct Blue 2B (C.I. 189); C.I. 189; Direct Blue 189 (C.I. 189); 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[[4'-[(2-hydroxy-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylamino)-, trisodium salt
EINECS	Contact for details

Quality Control

Our C.I. Direct Blue 189 is manufactured under a stringent quality management system. Every batch undergoes rigorous testing to ensure consistent shade, strength, and purity, meeting the specifications required for industrial dyeing applications. A Certificate of Analysis (COA) detailing key parameters such as color strength, solubility, and impurity content is provided with each 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 incompatible materials and moisture. This product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to Standard
Solubility in Water	Conforms

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