Description

Vat Brown 3 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 raw material for industrial manufacturers requiring durable coloration, primarily targeting the textile dyeing and printing sectors for natural and synthetic fibers.

Application

• Textile Dyeing: Primary application for dyeing cotton, wool, and viscose rayon fabrics to achieve fast brown colors.
• Yarn Dyeing: Used in the batch dyeing of yarns and threads for weaving and knitting applications.
• Garment Processing: Employed in exhaust and continuous dyeing processes for finished apparel and workwear.
• Technical Textiles: Suitable for coloring industrial fabrics, canvas, and tarpaulins where color durability is critical.
• Leather Coloring: Applied in the dyeing of leather goods to provide stable and uniform brown hues.
• Ink Formulation: Serves as a colorant in specialty printing inks where high lightfastness is required.

Basic Information

Product Name	Vat Brown 3
CAS No.	131-92-0
Molecular Formula	C28H14N2O4
Molecular Weight	442.42 g/mol
Synonyms	C.I. Vat Brown 3; C.I. 69015; Vat Brown BR; Indanthren Brown BR; Caledon Brown BR; Durindone Brown BR; Cibanone Brown BR; Mikethrene Brown BR
EINECS	205-048-2

Quality Control

Our Vat Brown 3 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each production lot undergoes comprehensive analytical testing, including spectrophotometric analysis and thin-layer chromatography, to verify identity and strength. A Certificate of Analysis (COA) detailing purity, shade, and fastness properties is provided with every shipment to 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 strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Shade	Conforms to standard sample
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Particle Size	≥ 90% passes 80 mesh
Fastness to Light	≥ 6-7 (ISO 105-B02)
Fastness to Washing	≥ 4-5 (ISO 105-C06)

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