Description

Direct Pure Yellow 5G is a synthetic, water-soluble azo dye belonging to the direct dye class, known for its bright and pure yellow hue. It is valued for its excellent substantivity to cellulosic fibers like cotton, rayon, and paper, providing good wash and light fastness properties. This dye is essential for manufacturers in the textile, paper, and leather industries seeking a reliable and efficient coloring agent for batch or continuous dyeing processes. Its consistent performance makes it a key component for producing vibrant yellow shades in various material applications.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers in exhaust and continuous dyeing processes.
• Paper Coloring: Used for tinting and dyeing paper pulp, tissue, and specialty papers to achieve uniform yellow coloration.
• Leather Finishing: Employed in the dyeing of leather goods, providing rich and even yellow tones with good penetration.
• Ink Formulation: A colorant component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Craft and Educational Dyes: Suitable for use in educational kits and craft materials for coloring natural fabrics.

Basic Information

Product Name	Direct Pure Yellow 5G
CAS No.	10130-29-7
Molecular Formula	C30H26N4Na2O8S2
Molecular Weight	696.66 g/mol
Synonyms	Direct Yellow 5G; C.I. Direct Yellow 5G; C.I. 13920; Direct Fast Yellow 5G; Amanil Fast Yellow 5G; Atlantic Direct Yellow 5G; Chlorazol Yellow 5G; Sirius Supra Yellow 5G; Pyrazol Yellow 5G; Diazol Fast Yellow 5G
EINECS	233-349-7

Quality Control

Our Direct Pure Yellow 5G is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing against established specifications for color strength, shade, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with every shipment. Our production adheres to relevant industry and safety standards, including REACH registration for global market compliance.

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) and hygroscopic (moisture-sensitive); ensure the original packaging is resealed after use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to Brownish-Yellow Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Dye Content	≥ 90%
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0
Fastness Properties	Typical values available on request

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