Description

Direct Fast Brown Brl CAS NO 18071-86-8 is a high-performance, water-soluble azo dye belonging to the class of direct dyes, prized for its excellent substantivity to cellulosic fibers. This compound delivers a strong, level brown shade with good fastness properties, making it a critical component for achieving consistent and reliable coloration in demanding industrial processes. It is primarily utilized by manufacturers in the textile, leather, and paper industries seeking efficient and cost-effective dyeing solutions for natural fibers.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fabrics in exhaust and continuous dyeing processes.
• Leather Coloring: Used for dyeing leather goods, providing rich and uniform brown tones with good penetration.
• Paper Staining: Employed in the production of colored papers, paperboards, and specialty packaging materials.
• Ink Formulation: Serves as a colorant in the manufacture of inks for various printing applications.
• Wood Staining: Applied for coloring wood and wood-based products to enhance aesthetic appeal.
• Biological Staining (Histology): May be used in laboratory settings as a biological stain for microscopic analysis.

Basic Information

Product Name	Direct Fast Brown Brl
CAS No.	18071-86-8
Molecular Formula	C32H20N6Na2O8S2
Molecular Weight	734.65 g/mol
Synonyms	Direct Brown BRL; C.I. Direct Brown 1; Direct Fast Brown BRL; Direct Brown 1; Benzo Brown BRL; Sirius Brown BRL; Chloramine Brown BRL; Diazol Brown BRL; Atlantic Brown BRL; Pontamine Brown BRL
EINECS	Contact for details

Quality Control

Our Direct Fast Brown Brl is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive analytical testing, including spectrophotometric analysis for strength and shade, to meet precise industry specifications. A Certificate of Analysis (COA) detailing purity, solubility, and fastness properties is provided with every 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). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 98%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Ash Content	≤ 1.0%

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