Description

Direct Yellow 29 is a synthetic organic dye belonging to the class of direct or substantive dyes, known for their ability to color cellulose fibers like cotton and paper without the need for a mordant. Its primary value lies in providing a bright, strong yellow shade with good light and wash fastness properties, making it a reliable and cost-effective coloring agent. This product is essential for manufacturers in the textile, paper, and leather industries seeking consistent, high-quality coloration for their products.

Application

• Textile Dyeing: Primarily used for dyeing cotton, viscose, and other cellulosic fibers to achieve a bright yellow hue.
• Paper Coloring: Applied in the production of colored papers, tissues, and paperboard for packaging and decorative purposes.
• Leather Finishing: Used to dye leather goods, providing uniform and vibrant yellow coloration.
• Ink Formulation: Serves as a colorant in the manufacture of inks for various printing applications.
• Biological Staining: May be utilized in specific histological or microbiological staining protocols in laboratory settings.

Basic Information

Product Name	Direct Yellow 29
CAS No.	6537-66-2
Molecular Formula	C30H26N4Na2O8S2
Molecular Weight	696.66 g/mol
Synonyms	Direct Fast Yellow GC; Direct Yellow GC; C.I. Direct Yellow 29; Direct Yellow 5G; Amanil Fast Yellow GC; Sirius Supra Yellow GC; Benzo Fast Yellow GC; Diazol Fast Yellow GC
EINECS	229-439-2

Quality Control

Our Direct Yellow 29 is manufactured under a strict 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 the demanding standards of industrial dyeing processes. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics 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	≥ 98% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Within Agreed Tolerance
Solubility in Water	Conforms

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