Description

Direct Yellow 58 is a synthetic diazo dye belonging to the direct dye class, valued for its strong affinity to cellulosic fibers like cotton and rayon. Its primary commercial value lies in providing a bright, economical, and wash-fast yellow coloration in textile dyeing and paper coloring processes. This product is essential for manufacturers in the textile, paper, and leather industries seeking consistent, high-quality colorants for bulk production.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose rayon, and other cellulosic fabrics to achieve a bright yellow shade with good wash fastness.
• Paper Coloring: Used in the mass coloration of paper products, including packaging materials, tissues, and specialty papers.
• Leather Finishing: Imparts color to leather goods in the tanning and finishing stages.
• Ink Formulation: Serves as a colorant component in certain types of inks for industrial marking or packaging.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Can be applied for coloring wood and wood-based products.

Basic Information

Product Name	Direct Yellow 58
CAS No.	12217-73-1
Molecular Formula	C29H19N5Na2O8S2
Molecular Weight	695.60 g/mol
Synonyms	Direct Fast Yellow 5G; Direct Yellow 5G; C.I. Direct Yellow 58; Direct Yellow 5GL; Pontamine Fast Yellow 5GL; Sirius Supra Yellow 5G; Solophenyl Yellow 5GL; Amanil Fast Yellow 5G; Benzo Fast Yellow 5G; Diazol Yellow 5G; Pyrazol Yellow 5G
EINECS	Contact for details

Quality Control

Our Direct Yellow 58 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet industry specifications. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with every shipment to support your quality assurance protocols.

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
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
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.