Description

Fast Brown G is a synthetic organic colorant widely recognized for its stable brown hue and excellent performance in demanding industrial applications. Its consistent quality and reliable color strength make it a critical component for manufacturers requiring precise and durable coloration. This product is essential for industries such as textiles, leather finishing, and specialty inks, where color fastness and batch-to-batch uniformity are paramount.

Application

• Textile Dyeing: Primary application for dyeing cotton, wool, and nylon fibers, valued for its good wash and light fastness.
• Leather Finishing: Used in the dyeing of leather goods, providing rich, uniform brown shades with good penetration.
• Paper Coloring: Employed in the production of specialty papers, including decorative and packaging materials.
• Wood Staining: Applied in stains and finishes for wood to achieve consistent brown tones.
• Ink Formulation: A key pigment for manufacturing printing inks, including those for flexographic and gravure printing.
• Biological Staining: Used in specific histological and microbiological staining protocols in laboratory settings.

Basic Information

Product Name	Fast Brown G
CAS No.	5850-20-4
Molecular Formula	C32H24N8Na4O14S4
Molecular Weight	992.80 g/mol
Synonyms	Acid Brown G; C.I. Acid Brown 14; C.I. 20195; Lanasyn Brown G; Supranol Fast Brown G; Telon Fast Brown G; Amacid Brown G; Dermacid Brown G; Leather Brown G
EINECS	227-450-8

Quality Control

Our Fast Brown G is manufactured under a stringent quality management system to ensure it meets the high standards required for industrial use. Every batch is tested for critical parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with each shipment to guarantee traceability and performance consistency.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms to standard
Assay (Color Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm
Shade	Within agreed tolerance
Fastness Properties	To be specified per grade

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