Description

Direct Brown 79 is a synthetic azo dye belonging to the class of direct dyes, valued for its strong affinity to cellulosic fibers without the need for a mordant. Its primary value lies in providing a cost-effective and durable brown coloration with good wash and light fastness properties in aqueous dyeing processes. This product is essential for manufacturers in the textile, leather, and paper industries seeking reliable and consistent dyeing results.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fabrics to achieve various shades of brown.
• Leather Coloring: Used in the tanning industry for coloring leather goods, providing deep and even penetration.
• Paper Industry: Employed in the production of colored papers, paperboards, and specialty packaging materials.
• Ink Formulation: Serves as a colorant in the manufacture of inks for specific printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Applied for coloring wood and wood-based products to enhance aesthetic appeal.

Basic Information

Product Name	Direct Brown 79
CAS No.	6483-77-8
Molecular Formula	C31H23N7Na2O8S2
Molecular Weight	739.66 g/mol
Synonyms	Direct Brown 79; C.I. Direct Brown 79; Direct Brown M; Amanil Brown M; Atlantic Brown M; Benzo Brown M; Chloramine Brown M; Diazol Brown M; Diphenyl Brown M; Sirius Brown M; Solophenyl Brown M; Azo Brown Dye
EINECS	229-353-5

Quality Control

Our Direct Brown 79 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against established specifications for color strength, shade, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with every shipment to guarantee it meets the demands of industrial dyeing processes.

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 incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Brown to Dark Brown Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to Standard
Solubility in Water	Conforms
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.