Description

Direct Red 72 is a synthetic azo dye belonging to the direct dye class, valued for its strong affinity to cellulosic fibers like cotton and rayon. Its primary commercial value lies in providing a bright, wash-fast red coloration in textile dyeing and printing applications. This product is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality colorants for their production processes. We supply Direct Red 72 CAS NO 8005-64-9 to meet the stringent demands of global industrial users.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose rayon, and other cellulosic fabrics to achieve a bright red shade with good wash fastness.
• Leather Coloring: Used in the dyeing of leather goods, providing rich and uniform color penetration.
• Paper Staining: Employed in the production of colored papers, tissues, and packaging materials.
• Ink Formulation: A colorant component in the manufacturing of certain types of inks for specialty printing.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Applied for coloring wood and wood-based products.

Basic Information

Product Name	Direct Red 72
CAS No.	8005-64-9
Molecular Formula	C29H19N5Na2O8S2
Molecular Weight	695.66 g/mol
Synonyms	Direct Fast Scarlet 4BS; C.I. Direct Red 72; Direct Scarlet 4BS; Pontamine Fast Scarlet 4BS; Amanil Fast Scarlet 4BS; Chloramine Fast Scarlet 4BS; Sirius Scarlet 4BS; Atul Direct Fast Scarlet 4BS
EINECS	232-352-1

Quality Control

Our Direct Red 72 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee compliance with your specifications and industry standards.

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	Reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	≥ 98% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 50 ppm

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