Description

Acid Yellow 64 is a synthetic anionic dye belonging to the azo chemical class, widely recognized for its bright yellow hue and good lightfastness. Its primary value lies in providing vibrant, durable coloration for protein-based substrates like wool, silk, and nylon, as well as in specialized applications such as leather finishing and paper staining. This dye is essential for manufacturers in the textile, leather goods, and specialty paper industries seeking consistent, high-quality yellow shades. With the CAS registry number 12220-68-7, it is a standardized colorant for industrial use.

Application

• Textile Dyeing: Primarily used for dyeing wool, silk, and nylon fibers to achieve bright, wash-fast yellow colors.
• Leather Coloring: Applied in the finishing of leather goods, including footwear, bags, and upholstery, for uniform coloration.
• Paper Staining: Employed in the production of decorative papers, security papers, and specialty packaging.
• Ink Formulation: Serves as a colorant in the manufacture of inks for various printing applications.
• Biological Staining: Used in histology and microscopy as a stain for specific tissue components in laboratory settings.
• Wood Staining: Imparts a yellow color to wood surfaces in furniture and decorative woodworking.

Basic Information

Item	Detail
Product Name	Acid Yellow 64
CAS No.	12220-68-7
Molecular Formula	C26H19N4NaO8S2
Molecular Weight	610.57 g/mol
Synonyms	Acid Leather Yellow G; C.I. 13065; Acid Yellow G; Acid Fast Yellow G; Lissamine Yellow G; Wool Yellow G; Kiton Yellow G; Supranol Yellow G; Azo Yellow A-G; 6-Hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonic acid disodium salt
EINECS	235-428-9

Quality Control

Our Acid Yellow 64 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet industrial dye standards. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to guarantee product integrity for your 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 strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm

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