Description

Direct Blue 183 is a synthetic, water-soluble azo dye belonging to the class of direct dyes. It is valued for its strong affinity to cellulosic fibers, providing deep and vibrant blue shades with good wash and light fastness properties. This dye is primarily used in the textile industry for dyeing cotton, viscose, and other natural fibers, as well as in the paper and leather industries.

Application

• Primary dyeing of cotton yarns and fabrics.
• Coloration of viscose (rayon) and other regenerated cellulose materials.
• Dyeing of paper and paperboard for packaging or decorative purposes.
• Application in the leather industry for finishing hides and skins.
• Used in the production of colored wood pulp for specialty papers.
• Formulation of inks for specific industrial marking applications.

Basic Information

Product Name	Direct Blue 183
CAS No.	6416-69-9
Molecular Formula	C32H20N6Na4O16S4
Molecular Weight	996.80 g/mol
Synonyms	Direct Blue 183; C.I. Direct Blue 183; Direct Blue 2B; Direct Blue B; Direct Blue 2B-N; Direct Blue 2B New; Direct Blue 2BN; Direct Blue 2B (C.I. 34140); Pontamine Blue 2B; Aizen Direct Blue 2BH
EINECS	229-119-5

Quality Control

Our Direct Blue 183 is manufactured under a strict quality management system. Every batch undergoes comprehensive testing to ensure consistent shade, strength, and solubility. Key parameters such as color value, purity, and fastness properties are verified. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee compliance with your specifications.

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 and incompatible materials.

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	Conforms
Fastness Properties (Typical)	Light: 4-5; Wash: 3-4

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