Description

C.I.Direct Yellow 52 is a high-performance, water-soluble direct dye belonging to the benzidine derivative class. It is valued for its strong affinity to cellulosic fibers, providing excellent build-up and good wet fastness properties. This dye is primarily used in the textile industry for dyeing cotton, viscose, and paper, offering a bright and economical yellow shade. Its consistent quality and reliable performance make it a staple for industrial dyeing and printing processes.

Application

• Primary dyeing of cotton and other cellulosic fibers in exhaust and continuous processes.
• Dyeing of viscose rayon and regenerated cellulose materials.
• Coloration of paper and paperboard for packaging and specialty products.
• Used in the formulation of inks for specific printing applications.
• Dyeing of leather to achieve yellow hues.
• As a colorant for soaps and detergents where applicable.
• Potential use as a biological stain in laboratory settings.
• Blending with other direct dyes to create a wide range of compound shades.

Basic Information

Product Name	C.I. Direct Yellow 52
CAS No.	61725-04-0
Molecular Formula	C35H25N7Na2O10S2
Molecular Weight	813.78 g/mol
Synonyms	Direct Yellow 52; C.I. 29025; Direct Fast Yellow GC; Direct Yellow GC; Direct Yellow GCL; Amanil Fast Yellow GC; Atul Direct Fast Yellow GC; Benzidine Yellow GC; Pyrazol Yellow GC; Sirius Supra Yellow GC; Solophenyl Yellow AGL
EINECS	262-964-7

Quality Control

Our production of C.I. Direct Yellow 52 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with each shipment 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 kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Brownish-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Fastness to Washing	≥ 3 (ISO 105-C03)
Fastness to Light	≥ 4-5 (ISO 105-B02)
Solubility in Water	Conforms

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