Description

Vat Brown 57 is a high-performance vat dye belonging to the anthraquinone chemical class, known for its excellent color fastness and stability. This compound is particularly valued for its ability to produce deep, rich brown shades that are resistant to light, washing, and chlorine. It is an essential material for manufacturers in the textile and leather industries seeking durable and vibrant coloration. The product is supplied under the identifier CAS No. 12227-28-0.

Application

The primary use of Vat Brown 57 is in applications demanding superior color permanence and chemical resistance. Key industrial applications include:

• Textile Dyeing: For cotton, linen, viscose, and other cellulosic fibers to achieve wash-fast and light-fast brown hues.
• Leather Finishing: Imparting durable and uniform brown colors to leather goods, including apparel, footwear, and upholstery.
• Technical Fabrics: Coloration of industrial fabrics, awning cloth, and canvas where exposure to weather and UV light is a concern.
• Yarn Dyeing: Used in the package and skein dyeing processes for sewing threads and other yarns.
• Pigment Manufacturing: Serving as a precursor or colorant in the production of high-performance organic pigments.

Basic Information

Product Name	Vat Brown 57
CAS No.	12227-28-0
Molecular Formula	C42H18N4O8
Molecular Weight	706.62 g/mol
Synonyms	C.I. Vat Brown 57; C.I. 69015; Vat Brown BR; Vat Brown G; Cibanone Brown BR; Caledon Brown BR; Indanthren Brown BR; Mikethren Brown BR; Nihonthrene Brown BR; Paradone Brown BR; Solanthrene Brown BR
EINECS	235-428-7

Quality Control

Our Vat Brown 57 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Quality parameters are verified against industry standards for vat dyes, including assessments of color strength, shade, and particle size distribution. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with every shipment to guarantee compliance with your specifications.

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	Brown Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Particle Size	≥ 95% passes 80 mesh
Dyeing Performance	Conforms to Standard

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