Description

Acid Yellow 65 is a synthetic anionic dye belonging to the azo chemical class, widely recognized for its bright and stable yellow hue. This high-performance colorant is valued for its excellent lightfastness and strong affinity to various substrates, ensuring consistent and durable coloration. It is primarily utilized in the textile industry for dyeing and printing natural and synthetic fibers, as well as in the coloration of leather, paper, and specialty inks.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, nylon, and other polyamide fibers to achieve vibrant yellow shades.
• Leather Coloring: Used in the tanning industry to impart a uniform and fast yellow color to leather goods.
• Paper Staining: Effective for coloring paper products, including specialty papers and packaging materials.
• Ink Formulation: A key component in the manufacture of inks for writing, printing, and marking applications.
• Biological Staining: Potential use as a microscopic stain in laboratory and histology applications.

Basic Information

Product Name	Acid Yellow 65
CAS No.	6408-90-8
Molecular Formula	C16H12N4Na2O7S2
Molecular Weight	498.40 g/mol
Synonyms	Acid Yellow A; C.I. 14170; Acid Leather Yellow A; Acid Yellow 2G; Acid Fast Yellow A; Wool Yellow A; Lissamine Yellow A; Acid Yellow 2GX; 7-Hydroxy-8-[(E)-(4-sulfonatophenyl)diazenyl]naphthalene-1,3-disulfonic acid disodium salt
EINECS	229-077-6

Quality Control

Our Acid Yellow 65 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against stringent in-house specifications for color strength, shade, solubility, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 0.5%

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