Description

Direct Red 239 is a high-performance synthetic dye belonging to the direct dye class, valued for its strong affinity to cellulosic fibers. This product is essential for achieving deep, vibrant, and wash-fast red shades in industrial dyeing processes. It is primarily used by manufacturers in the textile, paper, and leather industries seeking reliable and efficient colorants for their production lines.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers to produce a range of red hues.
• Paper Coloring: Used in the manufacture of colored papers, tissues, and paperboard where deep red coloration is required.
• Leather Finishing: Employed in the dyeing of leather goods, providing rich and uniform color penetration.
• Ink Formulation: A potential colorant component for certain types of inks requiring specific red shades.
• Biological Staining: May find use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	Direct Red 239
CAS No.	60202-35-9
Molecular Formula	C35H25N7Na2O10S2
Molecular Weight	813.70 g/mol
Synonyms	C.I. Direct Red 239; Direct Fast Scarlet 4BS; Direct Scarlet 4BS; Pontamine Scarlet 4BS; Amanil Scarlet 4BS; Atul Direct Scarlet 4BS; Direct Red 4BS; Benzanil Scarlet 4BS
EINECS	262-140-6

Quality Control

Our Direct Red 239 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing, including spectrophotometric analysis for strength and shade, and assessments for solubility and fastness properties. A Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to guarantee it meets your specific application requirements.

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 and sources of ignition.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
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.