Description

Direct Yellow 117 is a high-performance, water-soluble disazo direct dye belonging to the benzidine derivative class. It is valued for its strong affinity to cellulosic fibers like cotton and rayon, providing excellent build-up and good wet fastness properties. This dye is essential for manufacturers in the textile industry seeking efficient and cost-effective coloring solutions for yarn, fabric, and paper products. Its consistent quality ensures reliable batch-to-batch reproducibility for industrial dyeing processes.

Application

• Primary dyeing and printing of cellulosic textiles such as cotton, viscose, and rayon.
• Coloration of paper and paperboard for packaging and specialty papers.
• Dyeing of leather to achieve vibrant yellow shades.
• Tinting of soaps and detergents where color consistency is required.
• As a colorant for biological stains in specific laboratory and microscopy applications.
• Manufacture of inkjet inks and other specialty inks requiring good water solubility.

Basic Information

Item	Detail
Product Name	Direct Yellow 117
CAS No.	12217-74-2
Molecular Formula	C36H26N10Na4O16S4
Molecular Weight	1082.88 g/mol
Synonyms	Direct Fast Yellow 5R; Direct Yellow 5R; C.I. Direct Yellow 117; Direct Yellow 5RL; Pontamine Yellow 5R; Benzo Fast Yellow 5R; Sirius Supra Yellow 5R; Direct Yellow 5RLL; 2,2'-[4,4'-Biphenylylenebis(azo)]bis[5-amino-4-hydroxy-3,6-disulfonaphthalene] tetrasodium salt
EINECS	Contact for details

Quality Control

Our Direct Yellow 117 is manufactured under a strict quality management system. Every batch is tested to ensure it meets precise specifications for shade, strength, solubility, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) that detail all critical parameters, ensuring full traceability and compliance with your technical requirements. Our quality commitment supports consistent performance in your downstream applications.

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 hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Brownish-yellow to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 98%
Moisture Content	≤ 5.0%
Water Solubility	≥ 50 g/L (clear solution)
pH (1% Solution)	6.0 - 8.0
Shade	Within agreed tolerance to standard
Fastness Properties	To be specified per grade

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