Description

Vat Blue 4 is a high-performance, synthetic organic pigment belonging to the vat dye class, known for its excellent color fastness and chemical stability. This compound is valued for its ability to produce deep, vibrant blue shades that are exceptionally resistant to light, washing, and chemical degradation. It is a critical raw material for industrial manufacturers requiring durable coloration, particularly in the textile, plastics, and specialty coatings sectors. Our supply of Vat Blue 4 CAS NO 81-77-6 is backed by stringent quality control to ensure batch-to-batch consistency for demanding applications.

Application

• Textile Dyeing and Printing: Primarily used for dyeing cotton, wool, and other cellulosic fibers, providing excellent wash and light fastness.
• Plastics and Masterbatch Coloring: Imparts stable blue coloration to polymers like PVC, polyolefins, and engineering plastics.
• Industrial Coatings and Paints: Used in the formulation of high-durability paints, automotive finishes, and industrial coatings.
• Ink Manufacturing: A key pigment for high-quality printing inks, including packaging and security inks.
• Paper Coloration: Employed in specialty paper production where color permanence is required.
• Leather Finishing: Used for dyeing leather goods to achieve deep, lasting blue colors.

Basic Information

Product Name	Vat Blue 4
CAS No.	81-77-6
Molecular Formula	C28H14N2O4
Molecular Weight	442.42 g/mol
Synonyms	6,15-Dihydro-5,9,14,18-anthrazinetetrone; C.I. 69800; C.I. Vat Blue 4; Dibenzanthrone; Indanthrene Blue RS; Caledon Blue RS; Cibanone Blue 2R; Nihonthrene Blue RS; Pyranthrene Blue; Vat Blue RSN
EINECS	201-382-4

Quality Control

Our Vat Blue 4 is manufactured under a strict quality management system. Every batch is analyzed to ensure it meets precise specifications for color strength, shade, and chemical purity. We provide comprehensive Certificates of Analysis (COA) that detail key parameters such as purity, ash content, and particle size distribution. Our quality commitment ensures the product's performance and consistency for your critical industrial processes.

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 strong oxidizing agents and incompatible materials. The container must be kept tightly sealed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Ash Content	≤ 1.0%
Moisture Content	≤ 1.0%
Particle Size (Passing 80 mesh)	≥ 95.0%
Shade	Within agreed tolerance
Fastness Properties (Light, Wash)	Contact for details

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