Description

C.I. Direct Yellow 44 is a synthetic, water-soluble azo dye belonging to the direct dye class, valued for its bright and substantive yellow coloration on cellulosic fibers. Its primary commercial importance lies in its strong affinity for cotton, viscose, and paper, offering good wash fastness and level dyeing properties. This dye is essential for manufacturers in the textile, paper, and leather industries seeking a reliable and cost-effective yellow pigment for bulk production.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose rayon, and other cellulosic fabrics to achieve a bright yellow shade.
• Paper Coloring: Used in the mass coloration of paper products, including packaging materials, tissues, and specialty papers.
• Leather Finishing: Imparts color to leather goods in the tanning and finishing processes.
• Ink Formulation: A colorant component in the manufacture of certain inks, particularly for porous substrates.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Craft and Educational Dyes: Employed in educational kits and craft applications for dyeing natural materials.

Basic Information

Product Name	C.I. Direct Yellow 44
CAS No.	68988-66-9
Molecular Formula	C29H19N5Na2O8S2
Molecular Weight	695.66 g/mol
Synonyms	Direct Yellow 44; C.I. 29000; Direct Fast Yellow 5GL; Pontamine Fast Yellow 5GL; Sirius Supra Yellow 5GL; Chlorazol Yellow 5G; Direct Yellow 5GL; Benzo Fast Yellow 5GL
EINECS	Contact for details

Quality Control

Our production of C.I. Direct Yellow 44 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet industry specifications. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance 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 incompatible materials and sources of heat. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to Brownish-Yellow Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 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.