Description

C.I.Direct Brown 169 is a synthetic direct dye belonging to the azo chemical class, valued for its strong affinity to cellulosic fibers like cotton and viscose. Its primary commercial value lies in providing a cost-effective and reliable brown coloration with good wash fastness properties in exhaust dyeing processes. This product is essential for textile manufacturers, leather tanneries, and paper mills seeking consistent, deep brown shades for their products.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers to achieve various brown hues.
• Leather Coloring: Used in the tanning industry for dyeing leather goods, providing uniform and penetrating color.
• Paper Staining: Employed in the production of colored papers, paperboards, and specialty packaging materials.
• Ink Formulation: A potential colorant for certain types of inks where its solubility properties are advantageous.
• Biological Staining: May be used in specific histological or microbiological staining protocols as a diagnostic dye.

Basic Information

Product Name	C.I. Direct Brown 169
CAS No.	12217-58-2
Molecular Formula	C34H24N10Na4O14S4
Molecular Weight	1050.88 g/mol
Synonyms	Direct Brown 169; C.I. 31710; Direct Brown M; Direct Fast Brown M; Direct Brown MR; Pontamine Brown BR; Sirius Brown BR; Chlorantine Fast Brown MGL; Benzo Brown MR; Atul Direct Brown M
EINECS	Contact for details

Quality Control

Our C.I. Direct Brown 169 is manufactured under a strict quality management system. Every batch undergoes comprehensive testing for key parameters including color strength, shade, solubility, and impurity profile to ensure batch-to-batch consistency and compliance with industry standards. Certificates of Analysis (COA) detailing these specifications 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	Conforms (IR / HPLC)
Color Strength	100 ± 3% (Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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