Description

Mordant Yellow 8 is a synthetic organic dye belonging to the azo dye class, widely recognized for its chelating properties with metal ions. This compound is valued for its ability to form stable, colored complexes, making it a critical component in specialized staining and analytical procedures. It serves essential roles in the textile, leather, and histology industries, as well as in research laboratories for metallochromic indicators.

Application

• Textile Dyeing: Used as a mordant dye for wool, silk, and nylon, producing yellow shades with good light and wash fastness when complexed with metal salts like chromium or aluminum.
• Leather Coloring: Employed in the dyeing of leather goods, where it forms durable color complexes with the tanning metals present in the substrate.
• Biological Staining: Utilized in histology and microscopy as a metal-complexing stain for specific tissue components.
• Analytical Chemistry: Functions as a metallochromic indicator in complexometric titrations for the determination of metal ions such as aluminum and zirconium.
• Ink Formulation: Incorporated into specialty inks where color stability and metal interaction are required.
• Research & Development: Serves as a chemical intermediate and a model compound in studies of azo dye chemistry and metal-ligand interactions.

Basic Information

Product Name	Mordant Yellow 8
CAS No.	6359-83-7
Molecular Formula	C13H9N3Na2O8S2
Molecular Weight	477.33 g/mol
Synonyms	Aluminon; Ammonium aurintricarboxylate; 5-[(3-Carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-2-hydroxybenzoic acid, triammonium salt; C.I. Mordant Yellow 8; C.I. 43825; Acid Alizarin Blue; Aurintricarboxylic acid ammonium salt; ATA
EINECS	228-783-6

Quality Control

Our Mordant Yellow 8 is manufactured under a strict quality management system. Each batch is tested to ensure it meets precise specifications for color value, purity, and metal complexing performance. A comprehensive Certificate of Analysis (COA) detailing parameters such as assay, absorbance, and impurity profile is provided to guarantee consistent quality and batch-to-batch reliability for your industrial 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Orange-red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Absorbance (Lambda max)	Conforms
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Clear, yellow-orange solution

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