Description

C.I.Direct Blue 249 is a high-performance, water-soluble direct dye belonging to the azo chemical class. This compound is valued for its strong affinity to cellulosic fibers, providing excellent wash and light fastness properties in dyeing applications. It is primarily utilized by manufacturers in the textile, paper, and leather industries for producing deep, vibrant blue shades.

Application

• Primary dyeing of cotton, viscose, and other cellulosic fibers in the textile industry.
• Coloration of paper pulp and specialty papers for packaging and decorative purposes.
• Dyeing of leather goods, including full-grain and suede finishes.
• Used in the manufacture of ink for flexographic and gravure printing.
• Potential use as a colorant in the production of wood stains and coatings.
• Application in educational and research laboratories as a histological stain.

Basic Information

Product Name	C.I. Direct Blue 249
CAS No.	12222-14-9
Molecular Formula	C34H23N7Na2O10S2
Molecular Weight	791.71 g/mol
Synonyms	Direct Blue 249; C.I. 24410; Direct Blue 2B; Direct Blue B; Direct Blue BN; Direct Blue 2BN; Direct Blue 249 (C.I.); Benzenesulfonic acid, 4,4'-[1,3,4-thiadiazole-2,5-diylbis(azo)]bis[5-amino-4-hydroxy-3-[(4-sulfophenyl)azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Direct Blue 249 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark Blue to Bluish-Black Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Within agreed tolerance to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	To be specified per grade

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