Description

Direct Violet 51 is a synthetic, water-soluble dye belonging to the direct dye class, known for its strong affinity to cellulosic fibers. This product is valued for its ability to produce a deep, vibrant violet hue with good wash and light fastness properties on substrates like cotton, paper, and leather. It is primarily utilized by manufacturers in the textile, paper, and specialty ink industries seeking consistent and reliable colorants for their dyeing and printing processes.

Application

• Textile Dyeing: Primary application for coloring cotton, viscose, and other cellulosic fibers in exhaust and continuous dyeing processes.
• Paper Coloring: Used in the mass coloration of paper and paperboard to achieve uniform violet shades.
• Leather Finishing: Applied in the dyeing of leather goods to provide rich, durable color.
• Ink Formulation: A colorant component in the manufacture of certain types of inks, including stamp pad and flexographic inks.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Educational & Research: Serves as a chemical reagent in academic and industrial research laboratories for dye chemistry studies.

Basic Information

Product Name	Direct Violet 51
CAS No.	5489-77-0
Molecular Formula	C34H23N7Na2O10S2
Molecular Weight	791.70 g/mol
Synonyms	Direct Violet 51; C.I. Direct Violet 51; Direct Violet 5B; Direct Violet R; Direct Violet RL; Direct Violet 5BN; Benzo Violet 5B; Pontamine Violet 5B
EINECS	226-842-5

Quality Control

Our production of Direct Violet 51 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with every shipment.

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.

Specification

Item	Specification
Appearance	Dark violet to black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 90%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%

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