Description

Acid Brown 235 is a synthetic azo dye belonging to the acid dye class, valued for its strong affinity to protein fibers like wool, silk, and nylon. Its primary commercial value lies in providing excellent wash and light fastness, producing consistent and vibrant brown shades in textile applications. This dye is essential for manufacturers in the textile, leather, and paper industries seeking reliable and high-performance coloring agents for their products.

Application

• Primary dyeing of wool and silk fabrics and yarns.
• Coloration of nylon fibers and polyamide-based textiles.
• Leather dyeing for footwear, apparel, and upholstery.
• Paper staining and specialty paper product manufacturing.
• Ink formulation for specialized printing applications.
• As a colorant for non-textile substrates requiring acid dye compatibility.

Basic Information

Product Name	Acid Brown 235
CAS No.	12269-90-8
Molecular Formula	C32H24N8Na4O16S4
Molecular Weight	1048.88 g/mol
Synonyms	Acid Brown 235; C.I. Acid Brown 235; Acid Leather Brown 2GL; Acidol Brown M-BL; Amido Brown M-BL; Derma Brown 2GL; Lanasyn Brown 2GL; Nylosan Brown E-BL; Telon Brown K-2GL
EINECS	Contact for details

Quality Control

Our Acid Brown 235 is manufactured under a strict quality management system. Each batch undergoes comprehensive testing for critical parameters including color strength, shade, solubility, and impurity profile to ensure batch-to-batch consistency and compliance with industry standards. Certificates of Analysis (COA) detailing all test results are available upon request.

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
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Matches Standard
Solubility in Water	Conforms

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