Description

Mordant Yellow 12 is a synthetic organic dye belonging to the azo dye class, widely recognized for its use as a complexometric indicator and a biological stain. Its primary value lies in its ability to form stable, colored complexes with metal ions, particularly aluminum, making it a critical reagent in analytical chemistry and histology. This product is essential for laboratories and manufacturers in the chemical, textile, and life science sectors who require precise metal ion detection and staining solutions.

Application

• Complexometric Titration: Primarily used as a metallochromic indicator for the titration of aluminum, iron, and other metal ions with EDTA.
• Histological Staining: Employed as a biological stain in microscopy for visualizing specific tissue structures in combination with metal mordants.
• Textile Dyeing: Functions as a mordant dye for wool, silk, and nylon, where it forms insoluble lakes with metal salts on the fiber.
• Analytical Reagent: Serves as a colorimetric reagent in analytical methods for the detection and quantification of metal ions in various samples.
• Ink & Pigment Manufacturing: Used in the formulation of specialized inks and pigments where metal complexation properties are desired.
• Research & Development: A valuable tool in chemical and biochemical research for studying metal-ligand interactions and developing new analytical assays.

Basic Information

Product Name	Mordant Yellow 12
CAS No.	6470-98-0
Molecular Formula	C16H9N2NaO5S
Molecular Weight	364.31 g/mol
Synonyms	Aluminon; Aurintricarboxylic acid ammonium salt; 5-[(3-Carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-2-hydroxybenzoic acid triammonium salt; C.I. Mordant Yellow 12; C.I. 14025; Ammonium aurintricarboxylate; Aluminum reagent
EINECS	229-293-7

Quality Control

Our Mordant Yellow 12 is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including identification (IR), purity assay (HPLC), and tests for specific impurities to ensure it meets the high standards required for analytical and laboratory use. A Certificate of Analysis (COA) detailing all test results and specifications is provided with every shipment to guarantee traceability and consistent quality.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Orange-red to brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, orange-red solution

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