Description

Acid Brown 165 is a synthetic acid dye belonging to the azo dye class, identified by CAS No. 61724-14-9. It is valued for its ability to provide consistent, deep brown shades with good fastness properties on protein-based substrates like wool, silk, and leather. This dye is essential for manufacturers in the textile, leather finishing, and specialty paper industries seeking reliable and vibrant coloration.

Application

• Primary dyeing and printing of wool and silk fabrics and yarns.
• Coloration of leather goods, including footwear, apparel, and upholstery.
• Staining and tinting applications for specialty papers and packaging materials.
• Used in the formulation of inks for specific marking and printing purposes.
• Potential use as a colorant for feathers and other natural protein fibers.
• Research and development applications in analytical chemistry as a pH indicator or biological stain.

Basic Information

Product Name	Acid Brown 165
CAS No.	61724-14-9
Molecular Formula	C32H24N8Na4O16S4
Molecular Weight	1048.86 g/mol
Synonyms	Acid Brown 165; C.I. Acid Brown 165; Acid Leather Brown 2GL; Acidol Brown M-BRL; Amacid Brown GL; Dermacid Brown 2GL; Lanasyn Brown S-2GL; Supranol Fast Brown GL; Telon Fast Brown K-GL; Nylosan Brown E-2GL
EINECS	Contact for details

Quality Control

Our Acid Brown 165 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for shade, strength, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with each shipment to guarantee batch-to-batch consistency and performance reliability.

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 when not in use to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 98%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Matches reference standard
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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