Description

C.I. Direct Blue 193 is a high-performance, water-soluble direct dye belonging to the azo chemical class. It is valued for its strong affinity to cellulosic fibers, providing excellent wash and light fastness properties in dyeing applications. This product is essential for manufacturers in the textile, paper, and leather industries seeking reliable and vibrant blue coloration.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers, offering deep navy to blackish-blue shades.
• Paper Coloring: Used in the production of colored papers, including specialty packaging, decorative papers, and security documents.
• Leather Finishing: Imparts color to leather goods such as footwear, bags, and upholstery.
• Ink Formulation: A key component in the manufacture of writing inks, stamp pad inks, and other aqueous-based ink systems.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	C.I. Direct Blue 193
CAS No.	65637-86-7
Molecular Formula	C34H24N7Na3O13S3
Molecular Weight	959.80 g/mol
Synonyms	Direct Blue 193; Direct Blue 2B-N; C.I. 24115; Direct Navy Blue 2B-N; Amanil Navy Blue 2B-N; Atul Direct Navy Blue 2B-N; Dinamine Navy Blue NB; Solamine Navy Blue NB; Sirius Supra Navy Blue 2B-N
EINECS	Contact for details

Quality Control

Our C.I. Direct Blue 193 is manufactured under a stringent quality management system. Each batch is tested to ensure consistent strength, shade, and chemical purity, meeting the specifications required for industrial dyeing processes. A Certificate of Analysis (COA) detailing key parameters such as dye content, solubility, and shade is provided with every shipment to guarantee reliable performance and batch-to-batch consistency.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Dark Blue to Black Powder
Identification (IR)	Conforms to Standard
Dye Content	≥ 95%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to Standard Sample
Solubility in Water	Conforms
Fastness Properties (Typical)	Light: 5-6; Wash: 4-5

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