Description

Arsenazo III Sodium Salt is a high-purity metallochromic indicator and complexometric reagent essential for precise analytical chemistry. Its primary value lies in forming highly sensitive and selective colored complexes with specific metal ions, enabling accurate detection and quantification. This product is critical for researchers and quality control laboratories in the environmental, pharmaceutical, and metallurgical sectors requiring reliable trace metal analysis.

Application

• Spectrophotometric Determination of Rare Earth Elements and actinides in geological and nuclear industry samples.
• Complexometric Titration Indicator for calcium, barium, and other alkaline earth metals in water hardness testing and pharmaceutical formulations.
• Research Reagent in Biochemistry for studying metal ion binding and transport mechanisms.
• Environmental Monitoring for detecting trace levels of heavy metals and radioactive elements in water and soil.
• Quality Control in Metallurgy for the analysis of alloy compositions and purity of high-grade metals.
• Teaching and Standard Preparation in academic and industrial laboratories for analytical method development.

Basic Information

Product Name	Arsenazo III Sodium Salt
CAS No.	68504-33-6
Molecular Formula	C22H16As2N4Na4O14S2
Molecular Weight	844.36 g/mol
Synonyms	Arsenazo III, Tetrasodium 2,2'-[1,8-dihydroxy-3,6-disulphonato-2,7-bis[(2-arsonophenyl)azo]naphthalene]; 2,7-Bis(2-arsonophenylazo)chromotropic acid tetrasodium salt; Neothorin; Uranon III; 2,2'-(1,8-Dihydroxy-3,6-disulfo-2,7-naphthalene-bis(azo))dibenzenearsonic acid tetrasodium salt
EINECS	Contact for details

Quality Control

Our Arsenazo III Sodium Salt is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including spectrophotometric purity assessment and heavy metal screening, to ensure it meets the high standards required for sensitive analytical applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and performance characteristics is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed in a low-humidity environment to prevent degradation and maintain analytical performance.

Specification

Item	Specification
Appearance	Dark purple to brownish-black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 8.0%
Absorbance Ratio (A655nm/A540nm)	≥ 1.5 (in water)
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Complete, clear solution

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