Description

C.I.Direct Blue 248 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 seeking reliable and consistent coloration for cotton, viscose, and other regenerated fibers. Its formulation ensures ease of application in exhaust and continuous dyeing processes.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, viscose, and other cellulosic fabrics to achieve navy and royal blue shades.
• Paper Coloring: Used in the tinting and surface coloring of paper and paperboard products.
• Leather Finishing: Employed in the dyeing of leather goods, providing uniform color penetration.
• Ink Formulation: A colorant component in the manufacture of certain types of inks, including those for flexographic printing.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	C.I. Direct Blue 248
CAS No.	12222-13-8
Molecular Formula	C34H24N6Na4O16S4
Molecular Weight	996.82 g/mol
Synonyms	Direct Blue 248; C.I. 12222-13-8; Direct Blue 2B; Pontamine Blue 2B; Sirius Blue 2B; Aizen Direct Blue 2BH; Amanil Sky Blue 2B; Atul Direct Blue 2B; Benzo Sky Blue; Chloramine Sky Blue 2B
EINECS	Contact for details

Quality Control

Our C.I. Direct Blue 248 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise color strength, shade, and solubility specifications. A Certificate of Analysis (COA) detailing purity, impurity profile, and physical properties is provided with each shipment to guarantee batch-to-batch consistency and performance reliability.

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 hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and caking.

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	Conforms to Standard
Solubility in Water	Completely Soluble (Clear Solution)
pH (1% Solution)	7.0 - 9.0

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