Description

Acid Brown 101 is a synthetic acid dye belonging to the azo chemical class, identified by CAS No. 61724-09-2. This dye is valued for its ability to provide consistent, durable brown coloration with good fastness properties on protein-based substrates. It is primarily utilized by manufacturers in the textile and leather industries for dyeing wool, silk, and nylon fibers. Our supply ensures high purity and batch-to-batch consistency, meeting the stringent demands of industrial-scale production.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fabrics and yarns to achieve various shades of brown.
• Leather Finishing: Used in the dyeing process for leather goods, including footwear, apparel, and upholstery.
• Paper Staining: Employed for coloring specialty papers, including decorative and packaging materials.
• Ink Formulation: Serves as a colorant component in the manufacture of certain inks and toners.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Applied for imparting color to wood and wood-based products.

Basic Information

Item	Details
Product Name	Acid Brown 101
CAS No.	61724-09-2
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	624.49 g/mol
Synonyms	Acid Brown G; C.I. Acid Brown 101; Acid Leather Brown G; Acidol Brown M-GL; Amacid Brown G; Dermacid Brown G; Lissamine Brown G; Supranol Brown G; Telon Brown G; Tectilon Brown G; Nylosan Brown E-GL; Acid Fast Brown G; C.I. 15765
EINECS	262-974-5

Quality Control

Our Acid Brown 101 is manufactured under a strict quality management system. Every batch is tested to ensure it meets defined specifications for color strength, shade, solubility, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) upon request, detailing results for key parameters such as assay, moisture content, and heavy metal limits. Our quality protocols are designed to support compliance with global standards including REACH and industry-specific requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled 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 or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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