Description

C.I.Direct Brown 212 is a synthetic direct dye belonging to the azo chemical class, identified by CAS No. 12235-78-8. It is valued for its strong affinity to cellulosic fibers, providing deep, wash-fast brown shades with good leveling properties. This product is essential for manufacturers in the textile industry seeking reliable and consistent coloration for cotton, viscose, and other natural fibers.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, viscose, and other cellulosic fabrics to achieve a range of brown hues.
• Leather Coloring: Used in the tanning industry for dyeing leather goods, providing uniform and durable color.
• Paper Staining: Employed in the production of colored papers, tissues, and packaging materials.
• Ink Formulation: A colorant component in the manufacture of certain types of inks for specialized printing applications.
• Wood Staining: Applied for coloring wood and wood-based products to enhance aesthetic appeal.

Basic Information

Product Name	C.I.Direct Brown 212
CAS No.	12235-78-8
Molecular Formula	C35H25N7Na2O10S2
Molecular Weight	813.78 g/mol
Synonyms	Direct Brown 212; Direct Brown G; C.I. 31745; Direct Brown GR; Direct Brown G; Direct Fast Brown G; Direct Brown 2G; Amanil Fast Brown G
EINECS	Contact for details

Quality Control

Our production of C.I.Direct Brown 212 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and fastness properties. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance processes.

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.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	Washing: ≥ 3-4; Light: ≥ 4

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