Description

Arsenazo M CAS NO 3563-69-7 is a high-purity chromogenic reagent belonging to the arsenazo family of metallochromic indicators. This compound is valued for its exceptional selectivity and sensitivity in forming stable, colored complexes with specific metal ions, enabling precise quantitative analysis. It is an essential analytical tool for researchers and quality control laboratories in the environmental monitoring, metallurgy, and nuclear industries, where accurate trace metal detection is critical.

Application

• Spectrophotometric Determination of Rare Earth Elements (REEs): A key reagent for the sensitive and selective colorimetric analysis of lanthanides like lanthanum, cerium, and neodymium in geological and industrial samples.
• Uranium and Thorium Analysis: Employed in nuclear fuel cycle monitoring and environmental assays for the precise detection of actinides.
• Calcium and Magnesium Titration: Serves as a metallochromic indicator in complexometric titrations (e.g., with EDTA) for determining water hardness and related parameters.
• Research & Development: Used in academic and industrial R&D for studying metal-ligand interactions, developing new analytical methods, and synthesizing advanced materials.
• Quality Control in Metallurgy: Applied for the trace analysis of specific metal impurities or constituents in alloys, ores, and refined metals.
• Environmental Sample Testing: Facilitates the detection of heavy metal pollutants in water, soil, and industrial waste streams.

Basic Information

Product Name	Arsenazo M
CAS No.	3563-69-7
Molecular Formula	C22H18As2N4O14S2
Molecular Weight	776.36 g/mol
Synonyms	Arsenazo M; 2,7-Bis(2-arsonophenylazo)chromotropic acid; 2,2'-(1,8-Dihydroxy-3,6-disulfo-2,7-naphthalene-bis(azo))dibenzenearsonic acid; NSC 403079; 3,6-Bis[(2-arsonophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid; Arsenazo III analog; Bis(2-arsonophenylazo)chromotropic acid
EINECS	Contact for details

Quality Control

Our Arsenazo M is manufactured under strict quality protocols to ensure batch-to-batch consistency and high performance. Each lot undergoes comprehensive analytical testing, including purity assay by HPLC, identity confirmation (IR), and checks for moisture content and trace impurities. A Certificate of Analysis (COA) detailing all specifications and test results is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed in a dry environment to prevent degradation. For long-term stability, consider storage under desiccant.

Specification

Item	Specification
Appearance	Dark brown to purple-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Absorbance Ratio (Specific Wavelengths)	Meets internal standard
Solubility	Soluble in water, alkaline solutions

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