Description

Acid Brown 2 is a synthetic, water-soluble acid dye belonging to the azo dye class, identified by CAS No. 6409-08-1. This dye is valued for its ability to impart a consistent and durable brown coloration to various substrates, making it a critical component in industrial coloring processes. It is primarily used by manufacturers in the textile, leather, and paper industries seeking reliable and cost-effective dyeing solutions.

Application

• Textile Dyeing: Used for dyeing protein fibers like wool, silk, and nylon to achieve various shades of brown.
• Leather Finishing: Applied in the coloring of leather goods, including footwear, bags, and upholstery, for uniform pigmentation.
• Paper Staining: Employed in the production of colored papers, packaging materials, and specialty papers.
• Ink Formulation: Serves as a colorant in the manufacture of inks for specific printing applications.
• Biological Staining: May be utilized in histological and microbiological laboratories as a staining agent for tissue samples.
• Wood Staining: Applied to wood surfaces to enhance grain appearance and provide a protective color coat.

Basic Information

Product Name	Acid Brown 2
CAS No.	6409-08-1
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	624.49 g/mol
Synonyms	Acid Brown 2; C.I. Acid Brown 2; Acid Leather Brown 2; Acid Leather Brown D; Acid Brown A; Acid Brown 2G; Acid Brown 2R; 2-Naphthalenesulfonic acid, 7-[(2,4-diaminophenyl)azo]-8-hydroxy-3,6-disulfo-, disodium salt
EINECS	229-077-3

Quality Control

Our Acid Brown 2 is manufactured under a stringent quality management system. Each batch is tested to ensure it meets precise specifications for color strength, purity, and solubility. A comprehensive Certificate of Analysis (COA) detailing parameters such as assay, heavy metal content, and identification is provided to guarantee consistent performance and supply reliability for your industrial processes.

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 to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms
Assay (HPLC)	≥ 85%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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