Description

C.I. Direct Blue 165 is a high-performance, water-soluble direct dye belonging to the azo chemical class. It is valued for its excellent substantivity 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, particularly for dyeing cotton, viscose, and paper products where consistent color yield and process reliability are critical.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, rayon, and other cellulosic fibers.
• Paper Coloring: Used for tinting and dyeing paper pulp to achieve uniform blue coloration.
• Leather Finishing: Employed in the dyeing of leather goods to provide rich blue tones.
• Ink Formulation: A colorant component in the manufacture of certain aqueous-based inks.
• Biological Staining: Potential use as a histological stain in laboratory settings.

Basic Information

Product Name	C.I. Direct Blue 165
CAS No.	12222-03-6
Molecular Formula	C32H20N6Na2O8S2
Molecular Weight	750.65 g/mol
Synonyms	Direct Blue 165; C.I. 27415; Direct Blue B2RL; Amanil Sky Blue B; Atul Direct Sky Blue B; Dinamine Sky Blue B; Direct Sky Blue B; Sirius Supra Blue B-RL; Solar Sky Blue B; Sumilight Supra Blue B-RL
EINECS	Contact for details

Quality Control

Our production of C.I. Direct Blue 165 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, physical properties, and conformance to specification are available upon request.

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.

Specification

Item	Specification
Appearance	Blue to dark blue powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. 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.