Description

C.I.Acid Brown 291 is a synthetic acid dye belonging to the azo chemical class, widely recognized for its robust coloring properties. It is valued for its excellent light and wash fastness, providing consistent and reliable coloration in demanding industrial processes. This dye is essential for manufacturers in the textile, leather, and paper industries seeking durable and vibrant brown shades. The compound is identified by CAS No. 12234-75-2.

Application

This acid dye is engineered for high-performance applications where color integrity is paramount. Its primary and related uses include:

• Textile Dyeing: For coloring protein fibers such as wool, silk, and nylon, offering excellent penetration and leveling.
• Leather Finishing: Used in the dyeing of leather goods, providing rich, uniform color with good adhesion.
• Paper Staining: Applied in the production of specialty papers, decorative paper, and packaging materials.
• Ink Formulation: Serves as a colorant in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Imparts color to wood surfaces in furniture and decorative woodworking.

Basic Information

Product Name	C.I.Acid Brown 291
CAS No.	12234-75-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
EINECS	Contact for details
Synonyms	Acid Brown 291; C.I. 20195; Acid Leather Brown 2G; Acid Brown G; Acid Fast Brown G; Dermacid Brown 2G; Supranol Fast Brown G; Telon Fast Brown G (Various trade names may apply)

Quality Control

Our production of C.I.Acid Brown 291 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity and conformance to agreed specifications are provided with each shipment and 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. The material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Solubility in Water	Conforms

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