Description

C.I. Acid Brown 301 is a synthetic acid dye belonging to the azo chemical class, widely recognized for its robust brown hue and excellent dyeing properties. This high-performance colorant is valued for its strong affinity to protein fibers like wool, silk, and nylon, delivering consistent and vibrant coloration. It is an essential component for manufacturers in the textile, leather, and paper industries seeking reliable and durable brown shades for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and polyamide (nylon) fibers to achieve a range of brown shades.
• Leather Finishing: Used in the coloration of leather goods, providing rich and uniform brown tones with good fastness.
• Paper Staining: Employed in the production of specialty papers, including decorative and packaging materials.
• Ink Formulation: A colorant component for certain types of inks requiring acid-stable brown pigments.
• Biomaterial Staining: Potential use in laboratory settings for histological staining of biological tissues.

Basic Information

Product Name	C.I. Acid Brown 301
CAS No.	12219-77-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 301; C.I. 34945; Acid Leather Brown 2R; Acid Fast Brown BRL; Acidol Brown BRL; Amido Brown BRL; Derma Fast Brown BRL; Lanasyn Brown BRL; Supranol Fast Brown BRL; Telon Fast Brown BRL
EINECS	Contact for details

Quality Control

Our C.I. Acid Brown 301 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) documenting purity, physical properties, and conformance to specification is 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.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification	Conforms (IR / HPLC)
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Ash Content	≤ 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.