Description

C.I. Direct Brown 113 is a synthetic, water-soluble azo dye belonging to the direct dye class, widely recognized for its strong affinity to cellulose fibers. Its primary value lies in providing a cost-effective and reliable brown coloration with good wash fastness properties on cotton, viscose, and other cellulosic materials. This dye is essential for manufacturers in the textile industry, particularly for dyeing yarns, fabrics, and paper products where a durable brown shade is required.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, viscose, and other cellulosic fibers to achieve various brown shades.
• Paper Coloring: Used in the production of colored paper, paperboard, and specialty packaging materials.
• Leather Finishing: Employed in the dyeing of leather goods to impart consistent brown coloration.
• Ink Formulation: A component in the manufacture of certain types of inks for industrial marking or packaging.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	C.I. Direct Brown 113
CAS No.	61724-80-9
Molecular Formula	C35H25N7Na2O10S2
Molecular Weight	837.72 g/mol
Synonyms	Direct Brown 113; C.I. 30145; Direct Fast Brown BRL; Direct Brown BRL; Amanil Fast Brown BRL; Atul Direct Fast Brown BRL; Pyrazol Brown BRL; Sirius Supra Brown BRL; Chloramine Fast Brown BRL; Diazol Brown BRL
EINECS	262-964-5

Quality Control

Every batch of C.I. Direct Brown 113 is manufactured and tested under a strict quality management system to ensure consistent shade, strength, and solubility. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing key parameters such as color strength, shade, solubility, and impurity content 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 incompatible materials and sources of ignition. The product is light-sensitive and should be stored away from direct light exposure to prevent degradation.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
Shade	Conforms to standard
Fastness Properties	Typical values available

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