Description

Direct Yellow 50 is a synthetic anionic dye belonging to the direct dye class, known for its bright yellow hue and strong affinity for cellulosic fibers. Its primary value lies in providing excellent wash and light fastness properties on cotton, paper, and other substrates without the need for a mordant. This dye is essential for manufacturers in the textile, paper, and leather industries seeking a reliable and cost-effective coloring solution for bulk production.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers to achieve vibrant yellow shades.
• Paper Coloring: Used in the production of colored paper, tissues, and paperboard for packaging and decorative purposes.
• Leather Finishing: Imparts color to leather goods, including footwear, bags, and upholstery.
• Ink Formulation: A key component in the manufacture of inks for flexographic and other printing applications.
• Biological Staining: Employed in laboratory settings as a histological stain for microscopic analysis.
• Wood Staining: Provides coloration for wood products and bamboo materials.

Basic Information

Product Name	Direct Yellow 50
CAS No.	3214-47-9
Molecular Formula	C29H19N5Na2O8S2
Molecular Weight	699.60 g/mol
Synonyms	Direct Fast Yellow GC; C.I. Direct Yellow 50; Direct Yellow GC; Amanil Fast Yellow GC; Atul Direct Fast Yellow GC; Pyrazol Yellow; Benzo Fast Yellow GCL; Chlorazol Yellow GK; Sirius Supra Yellow GC
EINECS	221-730-8

Quality Control

Our Direct Yellow 50 is manufactured under a stringent quality management system 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 industrial dye standards. A comprehensive 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 strong oxidizing agents.

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%
pH (1% Solution)	6.0 - 8.0
Shade	Conforms to Standard

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