Description

C.I. Acid Brown 290 is a high-performance, water-soluble azo dye belonging to the acid dye class, widely recognized for its excellent tinctorial strength and good lightfastness. This dye is engineered to deliver consistent, vibrant brown shades with superior leveling properties and strong affinity for protein-based and polyamide fibers. It is an essential component for manufacturers in the textile, leather, and paper industries seeking reliable and cost-effective coloring solutions for a variety of substrates.

Application

• Primary dyeing and printing of wool and other protein fibers.
• Coloration of nylon and polyamide textiles.
• Dyeing of silk fabrics and yarns.
• Leather finishing for upholstery, footwear, and accessories.
• Paper staining and surface coloring for specialty papers.
• Ink formulation for specific industrial marking and identification applications.

Basic Information

Product Name	C.I. Acid Brown 290
CAS No.	12234-74-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 290; C.I. 20195; Acid Leather Brown 2GL; Nylosan Brown E-RL; Telon Brown K-3RL; Acid Fast Brown RL; Amichrome Brown RL; Derma Brown RL
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Brown 290 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including shade, strength, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) documenting these results is provided with each shipment to support your quality assurance 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). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Brown Powder
Identification	Conforms (IR)
Assay	≥ 95% (HPLC)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Matches Standard
Lightfastness	≥ 5 (ISO 105-B02)

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