Description

C.I.Direct Brown 211 is a high-performance direct dye belonging to the azo chemical class, identified by CAS No. 12222-30-9. It is valued for its excellent substantivity and build-up properties on cellulosic fibers, providing consistent and economical coloration. This product is essential for industrial operations in the textile dyeing and paper coloring sectors, where reliable shade reproducibility and fastness are critical.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers in exhaust and continuous dyeing processes.
• Paper Coloring: Used for mass coloration of paper and paperboard to achieve uniform brown shades.
• Leather Finishing: Employed in the dyeing of leather goods where good penetration and color yield are required.
• Ink Formulation: Serves as a colorant component in certain types of inks for packaging and specialty printing.
• Blend Dyeing: Suitable for dyeing blends of cellulosic fibers with synthetic fibers like polyester under specific conditions.
• Industrial Fabric Coloring: Applied for coloring fabrics used in non-apparel applications such as filters, canvases, and industrial liners.

Basic Information

Product Name	C.I. Direct Brown 211
CAS No.	12222-30-9
Molecular Formula	C35H25N7Na2O10S2
Molecular Weight	813.78 g/mol
Synonyms	Direct Brown 211; Direct Brown GR; C.I. 30045; Direct Brown GRLL; Amanil Brown GR; Atul Direct Brown GR; Pyrazol Brown GR; Sirius Brown GR; Solar Brown GR; Diazol Brown GR; Intralite Brown GR
EINECS	Contact for details

Quality Control

Our production of C.I. Direct Brown 211 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including shade, strength, solubility, and fastness properties. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

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 containers are sealed after use to prevent moisture absorption and caking.

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	≤ 0.5%
Shade	Conforms to standard
Solubility in Water	Conforms
Fastness Properties	Typical data available

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