Description

Arsenazo Iii Disodium Salt is a high-purity metallochromic indicator and complexometric reagent essential for precise analytical chemistry. Its primary value lies in its exceptional selectivity and sensitivity for the spectrophotometric determination of rare earth elements and thorium. This reagent is critically needed by analytical laboratories, quality control facilities, and research institutions in the nuclear, metallurgical, and environmental monitoring industries for accurate trace metal analysis.

Application

• Spectrophotometric Analysis: Primary reagent for the quantitative determination of lanthanides (rare earth elements) and actinides like thorium in solution.
• Nuclear Fuel Cycle Monitoring: Used in the analysis of process streams and waste materials for thorium and uranium content.
• Metallurgical QC: Assaying rare earth elements in alloys, ores, and refined metals.
• Environmental Testing: Detection and measurement of trace heavy metals and radioactive elements in water and soil samples.
• Research & Development: A key tool in chemical research for studying metal-ligand interactions and developing new analytical methods.
• Complexometric Titrations: Serves as a visual endpoint indicator for titrations involving specific metal ions.

Basic Information

Product Name	Arsenazo Iii Disodium Salt
CAS No.	62337-00-2
Molecular Formula	C22H14As2N4Na2O14S2
Molecular Weight	844.36 g/mol
Synonyms	Arsenazo III, Disodium Salt; 2,7-Bis(2-arsonophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic Acid Disodium Salt; 2,2'-(1,8-Dihydroxy-3,6-disulfo-2,7-naphthalene-bis(azo))dibenzenearsonic Acid Disodium Salt; Thoron; Neothoron; Uranon III; 2,7-Bis[(2-arsonophenyl)azo]-1,8-dihydroxynaphthalene-3,6-disulfonic Acid Disodium Salt
EINECS	Contact for details

Quality Control

Our Arsenazo Iii Disodium Salt is manufactured under strict quality protocols to ensure batch-to-batch consistency and high performance in sensitive analytical applications. Each lot undergoes rigorous testing, including purity assay by HPLC and spectrophotometric performance validation. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and specific performance characteristics is provided with every shipment to support your quality assurance requirements.

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 low-humidity environment to prevent degradation and ensure long-term stability.

Specification

Item	Specification
Appearance	Dark Purple to Brownish-Purple Powder
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Absorbance Ratio (λ max)	Conforms to Standard
Solubility (in Water)	Clear, Complete Solution

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