Description

Direct Yellow 39 is a synthetic, water-soluble azo dye belonging to the direct dye class, widely recognized for its bright and stable yellow hue. Its primary value lies in its strong affinity for cellulosic fibers like cotton, rayon, and paper, providing excellent colorfastness to washing without the need for a mordant. This dye is essential for manufacturers in the textile, paper, and leather industries seeking efficient and cost-effective coloring solutions for bulk materials. Its consistent performance makes it a reliable choice for producing vibrant yellow shades in various dyeing and printing applications.

Application

• Primary dyeing and printing of cotton fabrics and yarns.
• Coloration of regenerated cellulose fibers such as viscose rayon and lyocell.
• Pigmentation for paper products, including packaging, tissues, and specialty papers.
• Dyeing of leather goods to achieve uniform yellow tones.
• Coloring for non-woven fabrics and other cellulosic-based materials.
• Used in the manufacture of inks for specific industrial marking applications.

Basic Information

Product Name	Direct Yellow 39
CAS No.	12217-71-9
Molecular Formula	C30H26N4Na2O8S2
Molecular Weight	680.66 g/mol
Synonyms	Direct Fast Yellow 5G; C.I. Direct Yellow 39; Direct Yellow 5G; Amanil Fast Yellow 5G; Atul Direct Fast Yellow 5G; Pyrazol Yellow F; Sirius Supra Yellow 5G; Solar Fast Yellow 5G; Pontamine Fast Yellow 5G
EINECS	Contact for details

Quality Control

Our Direct Yellow 39 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Quality parameters including color strength, shade, solubility, and impurity profiles are rigorously tested against established internal specifications. A Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with each shipment to guarantee compliance with your technical requirements.

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 light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to Brownish-Yellow Powder
Identification (IR)	Conforms to Standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Shade	Matches Standard
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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