Description

Acid Mordant Brown 92 is a synthetic organic dye belonging to the mordant dye class, identified by CAS NO 5858-58-2. This compound is valued for its ability to form stable, complex colors when chelated with metal ions, providing excellent wash and light fastness properties. It is primarily required by manufacturers in the textile and leather industries for dyeing protein fibers like wool, silk, and specialty leather goods.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, producing rich brown shades with high fastness.
• Leather Finishing: Used in the coloration of high-quality leather goods, including apparel, accessories, and upholstery.
• Technical Dyeing: Suitable for dyeing specialty papers, wood stains, and other substrates requiring mordant dye properties.
• Historical and Craft Reproduction: Employed in the restoration of historical textiles and in craft applications for authentic color reproduction.
• Research & Development: Serves as a standard or intermediate in chemical research and the development of new dye formulations.

Basic Information

Product Name	Acid Mordant Brown 92
CAS No.	5858-58-2
Molecular Formula	C16H10N2Na2O8S2
Molecular Weight	468.36 g/mol
Synonyms	Acid Chrome Brown G; C.I. Mordant Brown 92; Chromate(1-), bis[5-[(2-hydroxy-5-sulfophenyl)azo]-2-hydroxybenzoato(4-)]-, sodium; Mordant Brown 92; Sodium 5-[(2-hydroxy-5-sulfophenyl)azo]salicylato(2-)]chromate(1-); Acid Brown G; C.I. 14255; Eriochrome Brown G
EINECS	227-475-2

Quality Control

Our Acid Mordant Brown 92 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent color strength, purity, and application performance. Key parameters such as dye content, shade, solubility, and fastness properties are verified. A Certificate of Analysis (COA) detailing these specifications is provided with each shipment to guarantee compliance with your technical requirements.

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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Shade	Conforms to standard pattern
Fastness Properties (Wool)	Light: 5-6; Wash: 4-5

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