Description

Direct Yellow 87 is a high-performance, water-soluble anionic dye belonging to the direct dye class, identified by CAS No. 70563-36-9. It is valued for its strong affinity to cellulosic fibers, providing excellent build-up and good wet fastness properties. This dye is essential for manufacturers in the textile industry seeking efficient and vibrant coloration for cotton, viscose, and other natural fibers.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers in exhaust and continuous dyeing processes.
• Paper Coloring: Used in the tinting and surface coloring of paper and paperboard products.
• Leather Finishing: Employed in the dyeing of leather goods to achieve consistent and deep yellow shades.
• Ink Formulation: A colorant component in the manufacture of certain types of inks, including for packaging and specialty printing.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	Direct Yellow 87
CAS No.	70563-36-9
Molecular Formula	C29H19N5Na2O8S2
Molecular Weight	667.60 g/mol
Synonyms	Direct Fast Yellow 7G; C.I. Direct Yellow 87; Direct Yellow 7G; Amanil Fast Yellow 7G; Atul Direct Fast Yellow 7G; Pyrazol Fast Yellow 7G; Sirius Supra Yellow 7G; Dinamine Fast Yellow 7G
EINECS	Contact for details

Quality Control

Our Direct Yellow 87 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. A comprehensive Certificate of Analysis (COA) detailing these results 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 incompatible materials. 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% (Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Shade	Conforms to Standard
Solubility in Water	Conforms

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