Description

Direct Brown 223 is a synthetic azo dye belonging to the direct dye class, widely recognized for its strong affinity to cellulosic fibers. This product is valued for its ability to produce deep, level brown shades with good wash and light fastness properties, making it a reliable choice for consistent coloration. It is primarily used by manufacturers 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 fibers
• Dyeing of paper products for packaging and specialty papers
• Leather finishing and dyeing applications
• Blend dyeing of cotton-polyester or other fiber mixtures
• Used in educational and research laboratories for dye chemistry studies

Basic Information

Product Name	Direct Brown 223
CAS No.	76930-14-8
Molecular Formula	C32H21N7Na2O8S2
Molecular Weight	749.66 g/mol
Synonyms	Direct Brown 223; C.I. Direct Brown 223; Direct Brown 2R; Direct Brown R; Direct Brown 2RL; Direct Brown 2RN; Direct Fast Brown 2R; Direct Brown 2RS
EINECS	Contact for details

Quality Control

Our Direct Brown 223 is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure it meets consistent standards for color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) detailing key parameters such as purity, ash content, and moisture 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	Brown to dark brown powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Ash Content	≤ 1.0%
Shade	Matches standard
Solubility in Water	Conforms

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