Description

C.I.Direct Yellow 85 is a high-performance, water-soluble direct dye belonging to the azo chemical class. This dye is valued for its strong affinity to cellulosic fibers, providing excellent build-up and good wet fastness properties. It is primarily used in the textile industry for dyeing cotton, viscose, and other natural fibers, as well as in the paper and leather industries. The compound is identified by CAS No. 80940-97-2.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, viscose, and other cellulosic fabrics in exhaust and continuous dyeing processes.
• Paper Coloring: Used for tinting and dyeing paper pulp to achieve consistent, vibrant yellow shades.
• Leather Finishing: Applied in the dyeing of leather goods, offering good penetration and color uniformity.
• Ink Formulation: Suitable for use in the manufacture of certain types of inks requiring good solubility and color strength.
• Batch Dyeing of Yarn: Effective for package and hank dyeing of cotton and blended yarns.
• Union Dyeing: Can be used in combination with other dyes for coloring fiber blends.

Basic Information

Product Name	C.I. Direct Yellow 85
CAS No.	80940-97-2
Molecular Formula	C29H19N5Na2O8S2
Molecular Weight	699.60 g/mol
Synonyms	Direct Yellow 85; C.I. 29025; Direct Fast Yellow 5G; Direct Yellow 5G; Sirius Yellow 5G; Solophenyl Yellow 5G; Chlorantine Fast Yellow 5G; Diazol Yellow 5G; Pyrazol Yellow 5G; Benzo Fast Yellow 5G
EINECS	Contact for details

Quality Control

Our production of C.I. Direct Yellow 85 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Each lot is tested for critical parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting these results are provided with every shipment to support your quality assurance processes.

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 and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Yellow to Brownish-Yellow Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Solubility in Water	Complete
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Water Insoluble Matter	≤ 0.5%
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.