Description

Direct Fast Brown M is a high-performance, water-soluble azo dye belonging to the direct dye class, widely recognized for its excellent substantivity to cellulosic fibers. Its primary value lies in providing a durable, economical brown coloration with good wash and light fastness properties, making it a staple in textile coloration processes. This product is essential for industrial operations in the textile dyeing and printing sectors, particularly for cotton, viscose, and paper, where consistent color yield and batch-to-batch uniformity are critical.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, viscose, and other cellulosic fibers to achieve a uniform brown shade.
• Paper Coloring: Used in the mass coloration of paper and paperboard products.
• Leather Finishing: Employed in the dyeing of leather goods to provide rich, brown tones.
• Ink Formulation: A colorant component in the manufacture of certain types of inks.
• Biological Staining: Potential use as a histological stain in laboratory settings.
• Craft and Specialty Dyes: Suitable for use in batik, tie-dye, and other craft dyeing applications.

Basic Information

Product Name	Direct Fast Brown M
CAS No.	2429-82-5
Molecular Formula	C32H20N6Na2O8S2
Molecular Weight	734.65 g/mol
Synonyms	Direct Brown M; C.I. Direct Brown 2; Direct Fast Brown; Direct Brown 2BR; Direct Brown MR; Amanil Fast Brown M; Atlantic Direct Fast Brown M; Benzo Fast Brown M; Chloramine Fast Brown M
EINECS	219-375-7

Quality Control

Our Direct Fast Brown M is manufactured under a stringent quality management system to ensure it meets the high standards required for industrial dyeing applications. Every batch is tested for critical parameters including color strength, shade, solubility, and fastness properties to guarantee consistency and performance. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to standard
Assay (Colorant Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Shade	Conforms to standard sample
Fastness to Washing	Good to Very Good (3-4)
Fastness to Light	Moderate to Good (4)

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