Description

Vat Brown 1 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 pigment for industrial manufacturers requiring durable coloration in demanding environments. Key industries that utilize this product include textile dyeing, leather finishing, and the coloration of specialty papers and plastics.

Application

• Textile Dyeing: Primary application for dyeing cotton, wool, and viscose fibers to achieve fast brown colors.
• Leather Finishing: Used in the dyeing of leather goods, such as upholstery, bags, and footwear, for superior color depth and rub fastness.
• Paper Coloration: Employed in the production of specialty and decorative papers where high lightfastness is required.
• Plastics and Polymers: Suitable for coloring certain plastics where thermal stability and migration resistance are important.
• Ink Formulation: Used in the manufacture of high-quality printing inks for packaging and publications.
• Research & Development: Serves as a standard or intermediate in chemical research and analytical laboratories.

Basic Information

Product Name	Vat Brown 1
CAS No.	2475-33-4
Molecular Formula	C42H20N2O6
Molecular Weight	648.62 g/mol
Synonyms	C.I. Vat Brown 1; C.I. 70800; Vat Brown R; Caledon Brown R; Cibanone Brown R; Indanthren Brown R; Mikethrene Brown R; 16,17-Dihydrodinaphtho[2,3-a:2',3'-i]phenazine-5,9,14,18-tetrone
EINECS	219-598-6

Quality Control

Our Vat Brown 1 is manufactured under a strict quality management system to ensure batch-to-batch consistency and reliability. The product is tested against stringent in-house specifications for key parameters including color strength, shade, and purity. While it is produced to general industrial grade standards, specifications can be adjusted to meet specific customer requirements. A Certificate of Analysis (COA) detailing the results of these quality tests is provided with each shipment and is available upon request.

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 sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Particle Size	95% min. passes 80 mesh
Solubility	Practically insoluble in water; soluble in concentrated sulfuric acid

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