Description

Vat Brown 25 is a high-performance vat dye belonging to the anthraquinone chemical class, identified by CAS No. 6247-46-7. It is valued for its excellent color fastness properties, particularly its superior resistance to light, washing, and chlorine bleaching. This dye is essential for manufacturers requiring durable and vibrant brown shades on cellulosic fibers like cotton, linen, and viscose. Its robust performance makes it a critical component in the production of high-quality textiles for demanding applications.

Application

• Textile Dyeing and Printing: Primary application for dyeing and printing cotton, linen, rayon, and other cellulosic fabrics to achieve fast brown colors.
• Technical Textiles: Used in workwear, military fabrics, awnings, and outdoor textiles where exceptional lightfastness and washfastness are required.
• Yarn Dyeing: Employed for dyeing cotton and blended yarns intended for weaving or knitting into colorfast garments and home textiles.
• Denim and Jeans Production: Suitable for producing specialty shades and overdyeing effects on denim fabrics.
• Automotive and Upholstery Fabrics: Applied to fabrics requiring high durability against light exposure and frequent cleaning.
• Industrial Fabric Coloring: Used for coloring canvas, tarpaulins, and other industrial fabrics that face harsh environmental conditions.

Basic Information

Product Name	Vat Brown 25
CAS No.	6247-46-7
Molecular Formula	C42H18N2O6
Molecular Weight	646.60 g/mol
Synonyms	C.I. Vat Brown 25; C.I. 69015; Vat Brown BR; Cibanone Brown BR; Indanthren Brown BR; Caledon Brown BR; Mikethren Brown BR; 16,17-Dihydro-5,9,14,18-anthrazinetetrone, 6,15-dihydro-6,15-diphenyl-
EINECS	228-388-7

Quality Control

Our Vat Brown 25 is manufactured under a strict quality management system. Every batch is tested against rigorous internal specifications to ensure consistent shade, strength, and application performance. Key parameters such as color value, particle size distribution, and reduction properties are verified. A Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee product integrity and traceability.

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 heat, sparks, and open flame. Ensure the container is kept tightly sealed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Brown Powder
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Particle Size	> 95% passes 80 mesh
Dusting Quality	Low dusting
Reduction Properties	Conforms to Standard
Fastness Properties (Typical)	Light: 6-7; Wash: 4-5; Chlorine: 4-5

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