Description

Direct Blue 106 is a synthetic, water-soluble diazo dye belonging to the direct dye class, valued for its strong affinity to cellulosic fibers. Its primary commercial significance lies in providing a deep, vibrant blue shade with excellent wash-fastness properties on cotton, viscose, and other natural materials. This dye is essential for manufacturers in the textile industry seeking reliable and cost-effective coloration for yarns, fabrics, and garments.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, viscose, and other cellulosic fibers in exhaust and continuous dyeing processes.
• Paper Coloring: Used for tinting and coloring paper products, including specialty papers and packaging materials.
• Leather Finishing: Employed in the dyeing of leather goods to achieve consistent blue hues.
• Ink Formulation: A colorant component in the manufacture of certain inks for industrial marking or stamping.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	Direct Blue 106
CAS No.	6527-70-4
Molecular Formula	C32H20N6Na2O8S2
Molecular Weight	750.66 g/mol
Synonyms	Direct Blue 106; C.I. Direct Blue 106; Direct Blue 2B; Amanil Sky Blue 2B; Atul Direct Sky Blue 2B; Benzo Sky Blue 2B; Chloramine Sky Blue 2B; 3,3'-((3,3'-Dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(5-amino-4-hydroxy-2,7-naphthalenedisulfonic acid) disodium salt
EINECS	229-439-6

Quality Control

Our production of Direct Blue 106 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Key parameters such as color strength, shade, solubility, and impurity profiles are rigorously tested against established internal specifications. A Certificate of Analysis (COA) detailing these results 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 incompatible materials and moisture to maintain product integrity.

Specification

Item	Specification
Appearance	Dark Blue to Bluish-Black Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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