Description

Acid Yellow 79 is a synthetic anionic dye belonging to the azo chemical class, valued for its bright, stable yellow hue. It is engineered for exceptional color fastness and compatibility in demanding industrial dyeing and printing processes. This product is essential for manufacturers in the textile, leather, and paper industries seeking reliable and vibrant coloration.

Application

• Textile Dyeing: Primary application for dyeing nylon, silk, and wool fibers to achieve bright yellow shades with good wash and light fastness.
• Leather Finishing: Used in the coloration of leather goods, providing uniform and penetrating color for products like upholstery, bags, and apparel.
• Paper Coloring: Employed in the production of specialty papers, decorative papers, and packaging materials requiring specific color standards.
• Ink Formulation: A key component in the manufacture of inks for various printing applications, including inkjet and textile printing.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis, depending on purity grade.

Basic Information

Product Name	Acid Yellow 79
CAS No.	12220-70-1
Molecular Formula	C26H19N4NaO8S2
Molecular Weight	618.57 g/mol
Synonyms	Acid Yellow 79; C.I. 18640; Acid Leather Yellow PG; Acid Fast Yellow E-3G; Lissamine Fast Yellow 2G; Acid Yellow 2G; 7-Hydroxy-8-[(E)-(4-sulfonatophenyl)diazenyl]-1,3-naphthalenedisulfonic Acid Trisodium Salt; Trisodium 5-hydroxy-6-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate
EINECS	235-428-6

Quality Control

Our Acid Yellow 79 is produced under a strict quality management system. Each batch is tested to ensure it meets precise specifications for color strength, shade, solubility, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to guarantee consistency and compliance with your application 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). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
Ash Content	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm

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