Description

C.I. Acid Brown 44 is a synthetic azo dye belonging to the acid dye class, widely recognized for its brown hue and excellent dyeing properties. This product is valued for its strong affinity for protein fibers like wool, silk, and nylon, providing good color fastness and level dyeing characteristics. It is an essential colorant for the textile, leather, and paper industries, where consistent and vibrant brown shades are required.

Application

• Primary dyeing of wool, silk, and nylon textiles to achieve a range of brown shades.
• Leather finishing and coloring for footwear, upholstery, and accessories.
• Paper coloration for specialty packaging, decorative papers, and stationery.
• Ink formulation for applications requiring specific brown pigmentation.
• Dyeing of polyamide fibers and blends in the carpet and apparel sectors.
• As a colorant for non-textile substrates where an acid-stable brown dye is needed.

Basic Information

Product Name	C.I. Acid Brown 44
CAS No.	12238-96-9
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	624.49 g/mol
Synonyms	Acid Brown 44; Acid Leather Brown D; C.I. 20195; Acid Brown 2G; Acid Fast Brown G; Leather Brown D; Amido Brown G; Acid Brown G; Dermina Brown G; Telon Brown G; Nylosan Brown E-R; Supranol Brown G
EINECS	235-447-5

Quality Control

Our production of C.I. Acid Brown 44 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested for critical parameters including dye content, shade, solubility, and fastness properties. Certificates of Analysis (COA) documenting purity and conformance to agreed specifications are provided with every shipment.

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 and incompatible materials.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms to standard
Dye Content	≥ 95%
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.