Description

Acid Brown 298 is a synthetic acid dye belonging to the azo dye class, widely recognized for its excellent dyeing properties and color fastness. This high-performance dye is essential for achieving durable and vibrant brown shades on protein-based fibers like wool, silk, and nylon. It is a critical component for manufacturers in the textile, leather, and paper industries seeking reliable and consistent coloration for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a range of brown hues with good wash and light fastness.
• Leather Coloring: Used in the dyeing of leather goods, providing rich, uniform brown colors for footwear, apparel, and upholstery.
• Paper Staining: Employed in the production of specialty papers, including decorative and packaging materials, requiring specific color tones.
• Ink Formulation: A component in the manufacture of inks for various printing applications where a specific brown shade is required.
• Biomaterial Staining: Potential use in laboratory and histological settings for staining biological specimens, though specific grades must be verified.

Basic Information

Product Name	Acid Brown 298
CAS No.	12234-78-5
Molecular Formula	C32H20N6Na4O14S4
Molecular Weight	984.80 g/mol
Synonyms	Acid Brown G; C.I. Acid Brown 298; Acid Leather Brown G; Lanasyn Brown S-GL; Telon Brown G; Nylosan Brown E-GL; Supranol Brown GW; Acid Fast Brown G
EINECS	Contact for details

Quality Control

Our Acid Brown 298 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key 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 every shipment.

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.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Solubility in Water	Conforms
Fastness Properties	Contact for details

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