Description

Acid Brown 119 is a synthetic acid dye belonging to the azo dye class, known for its excellent affinity for protein fibers like wool, silk, and nylon. Its primary value lies in providing durable, wash-fast brown shades with good leveling properties and lightfastness, making it a reliable choice for consistent coloration. This dye is essential for manufacturers in the textile and leather industries seeking high-performance, cost-effective brown colorants for their products. It is also utilized in specialized applications such as paper coloration and the dyeing of other polyamide-based materials.

Application

• Primary dyeing of wool and wool-blend textiles to achieve brown hues.
• Coloration of silk fabrics and garments, leveraging its good affinity and brightness.
• Dyeing of nylon fibers and polyamide-based technical textiles.
• Leather finishing and dyeing for upholstery, apparel, and accessories.
• Coloration of paper and paperboard for specialty packaging or decorative purposes.
• As a component in color formulations for creating a range of darker, muted shades.

Basic Information

Product Name	Acid Brown 119
CAS No.	69428-27-9
Molecular Formula	C32H21N5Na2O8S2
Molecular Weight	721.65 g/mol
Synonyms	Acid Brown G; C.I. Acid Brown 119; Acid Leather Brown G; Nylosan Brown E-R; Telon Brown K-3R; Acid Fast Brown G; Brown 119 (Acid); Sodium 4-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]naphthalene-1-sulfonate derivative
EINECS	Contact for details

Quality Control

Our Acid Brown 119 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each production lot undergoes comprehensive testing for key parameters including dye content, shade, solubility, and fastness properties. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee compliance with your technical specifications and industry standards.

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 incompatible materials and sources of heat. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Assay (Dye Content)	≥ 95%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard sample
Solubility in Water	Conforms
Fastness Properties (Light, Wash)	Grade 4-5 (Typical)

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