Description

Direct Violet 66 is a synthetic, water-soluble dye belonging to the direct dye class, valued for its strong affinity to cellulosic fibers. Its primary commercial value lies in providing a deep, uniform violet color with excellent wash and light fastness properties on cotton, rayon, and paper. This product is essential for manufacturers in the textile, paper, and leather industries seeking reliable and cost-effective coloration solutions. Consistent batch-to-batch quality ensures reproducible results in demanding industrial dyeing processes.

Application

• Primary dyeing and printing of cotton and other cellulosic textiles.
• Coloration of regenerated cellulose fibers such as viscose rayon.
• Production of colored paper and paperboard for packaging and specialty products.
• Dyeing of leather to achieve uniform violet shades.
• As a colorant for biological stains in microscopy and laboratory applications.
• Manufacturing of inks and toners where specific violet hues are required.

Basic Information

Product Name	Direct Violet 66
CAS No.	679-83-4
Molecular Formula	C29H19N5Na2O8S2
Molecular Weight	667.60 g/mol
Synonyms	Direct Violet 66; C.I. 29120; Direct Violet BN; Direct Violet 5B; Direct Violet R; Pontamine Violet B; Benzo Violet 4B; Aizen Direct Violet BH
EINECS	211-685-1

Quality Control

Our Direct Violet 66 is manufactured under a strict quality management system. Every batch is tested against stringent internal specifications to ensure consistent color strength, shade, and application performance. Key parameters such as purity, solubility, and fastness properties are verified. A Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee compliance 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 (store away from light).

Specification

Item	Specification
Appearance	Dark Violet to Black Powder
Identification (IR)	Conforms to Standard
Assay (Color Strength)	≥ 95% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Within agreed tolerance
Fastness Properties (Typical)	Light: 4-5; Wash: 3-4

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