Description

Vat Blue 19 is a high-performance vat dye belonging to the anthraquinone chemical class, identified by CAS No. 1328-18-3. It is valued for its excellent color fastness properties, particularly to light and washing, making it a critical component for durable coloration. This product is essential for manufacturers in the textile and specialty chemical industries seeking reliable and vibrant blue dyes for high-quality fabrics and technical applications.

Application

Vat Blue 19 is primarily used in applications demanding superior durability and color stability. Key industrial uses include:

• Textile Dyeing and Printing: For cotton, wool, and other cellulosic fibers to achieve deep, fast blue shades.
• Technical Textiles: In the production of workwear, automotive fabrics, and awnings where lightfastness is critical.
• Pigment Manufacturing: As a colorant precursor for producing high-performance organic pigments.
• Leather Coloring: For dyeing leather goods requiring consistent and fade-resistant color.
• Paper Staining: In specialty paper products where color permanence is important.
• Research & Development: As a standard or intermediate in chemical synthesis and analytical studies.

Basic Information

Product Name	Vat Blue 19
CAS No.	1328-18-3
Molecular Formula	C₂₈H₁₄N₂O₄
Molecular Weight	442.42 g/mol
Synonyms	Vat Blue 19; C.I. 59800; C.I. Vat Blue 19; Indanthrene Blue CL-B; Caledon Blue XRC; 16,17-Dimethoxydinaphtho[2,3-a:2',3'-h]phenazine-5,9,14,18-tetrone; 5,9,14,18-Tetrone-16,17-dimethoxydinaphtho(2,3-a:2',3'-h)phenazine; Amanthrene Blue CL-B
EINECS	215-545-0

Quality Control

Our Vat Blue 19 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing, including purity assay, shade strength, and fastness property evaluation. A Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to guarantee compliance with your technical requirements.

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. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Shade	Matches Standard
Moisture Content	≤ 2.0%
Ash Content	≤ 1.0%
Particle Size (Passing 80 mesh)	≥ 95%
Light Fastness (Standard Scale)	≥ 6-7
Washing Fastness (Standard Scale)	≥ 4-5

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