Description

C.I. Acid Brown 112 is a high-performance, water-soluble azo dye belonging to the acid dye class, valued for its excellent affinity for protein fibers like wool, silk, and nylon. Its primary value lies in delivering consistent, vibrant brown shades with good leveling properties, wash fastness, and lightfastness, making it a reliable choice for demanding textile applications. This dye is essential for manufacturers in the textile and leather industries seeking quality colorants for dyeing and printing processes. The CAS number for this compound is 12219-56-6.

Application

C.I. Acid Brown 112 is engineered for a range of industrial dyeing applications where color consistency and fiber affinity are critical. Its properties make it suitable for:

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve uniform brown hues.
• Leather Coloring: Used in the dyeing of leather goods, providing rich and durable color.
• Paper Staining: Employed for tinting specialty papers where acid-fast dyes are required.
• Ink Formulation: A component in the manufacture of certain types of inks, particularly for non-impact printing.
• Biomolecule Staining: Potential use in laboratory settings for histological staining of protein-based tissues.

Basic Information

Product Name	C.I. Acid Brown 112
CAS No.	12219-56-6
Molecular Formula	C32H21N5Na4O16S4
Molecular Weight	995.78 g/mol
Synonyms	Acid Brown 112; Acid Leather Brown PR; C.I. 12219; Acid Fast Brown PR; Amido Brown M-R; Dermacid Brown PR; Telon Fast Brown ANL; Supranol Fast Brown PR; Nylosan Brown N-5RL; Acid Brown MR; Leather Brown PR
EINECS	Contact for details

Quality Control

Every batch of C.I. Acid Brown 112 is produced and tested under a strict quality management system to ensure it meets the high standards required for industrial dyeing. Our quality control protocol includes verification of key parameters such as color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing specific test results, including purity by HPLC and heavy metal content, is provided with each shipment to guarantee batch-to-batch consistency and performance reliability.

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 product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption which may affect performance.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Ash Content	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm
Shade & Strength	Within 5% of standard

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