Description

Direct Yellow 118 is a synthetic, water-soluble azo dye belonging to the direct dye class, valued for its bright yellow hue and strong affinity for cellulosic fibers. Its primary commercial value lies in providing excellent color fastness to washing and light, making it a reliable choice for demanding textile applications. This dye is essential for manufacturers in the textile industry, particularly for dyeing cotton, viscose, and paper, where consistent batch-to-batch color yield is critical.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers to achieve a bright yellow shade.
• Paper Coloring: Used in the production of colored papers, tissues, and paperboard where good bleed resistance is required.
• Leather Finishing: Imparts color to leather goods, offering good penetration and uniformity on the substrate.
• Ink Formulation: A component in the manufacture of inks for flexographic and other printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	Direct Yellow 118
CAS No.	12217-75-3
Molecular Formula	C36H28N8Na4O16S4
Molecular Weight	1085.0 g/mol
Synonyms	Direct Fast Yellow 5G; C.I. Direct Yellow 118; Direct Yellow 5G; Pontamine Fast Yellow 5G; Sirius Supra Yellow 5G; Benzo Fast Yellow 5G; Aizen Direct Fast Yellow 5G; Solar Yellow 5G
EINECS	Contact for details

Quality Control

Our production of Direct Yellow 118 adheres to stringent quality management protocols to ensure consistent purity, color strength, and application performance. Every batch is tested against key parameters including dye content, shade, solubility, and fastness properties. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 resealed tightly after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellow to Brownish-Yellow Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Dye Content	≥ 90%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Shade on Cotton	Conforms to Standard
Fastness to Washing	≥ 4-5 (ISO 105-C03)
Fastness to Light	≥ 5 (ISO 105-B02)
Solubility in Water	Complete at 90°C

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