Description

Direct Green 68 is a synthetic, high-performance direct dye belonging to the azo chemical class, widely recognized for its strong affinity to cellulosic fibers. This product is valued for its excellent build-up properties, good lightfastness, and reliable shade reproducibility, making it a cost-effective choice for consistent coloration. It is primarily utilized by manufacturers in the textile industry for dyeing cotton, viscose, and other natural fibers, as well as in the paper and leather processing sectors.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, rayon, and other cellulosic fabrics.
• Paper Coloring: Used for tinting and dyeing of various paper grades, including tissue and packaging materials.
• Leather Finishing: Employed in the dyeing of leather goods to achieve deep, uniform green shades.
• Ink Formulation: Suitable component for certain types of industrial and specialty inks.
• Wood Staining: Applied for coloring wood and wood-based products.
• Biological Staining: Potential use as a histological stain in laboratory settings (subject to specific grade purity).

Basic Information

Product Name	Direct Green 68
CAS No.	61724-88-7
Molecular Formula	C34H23N7Na4O16S4
Molecular Weight	1085.88 g/mol
Synonyms	Direct Green 68; C.I. Direct Green 68; Direct Green B; Direct Green GS; Direct Green S; Direct Green 6B; Direct Dark Green; Benzo Dark Green B; Atul Direct Dark Green B; Pontamine Green S
EINECS	Contact for details

Quality Control

Our Direct Green 68 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for strength, shade, and solubility. A Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to guarantee consistency and support your quality assurance protocols.

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 heat. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Dark green to black powder
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 95% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Solubility in Water	Conforms
Lightfastness	≥ 4-5 (ISO 105-B02)
Washfastness	≥ 3-4 (ISO 105-C03)

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