Description

Arsenazo Iii CAS NO 17306-35-3 is a highly sensitive metallochromic indicator and complexometric reagent, specifically known for its selective chelation of rare earth elements and actinides. Its primary value lies in enabling precise spectrophotometric determination and trace analysis of metals like thorium, uranium, and lanthanides in complex matrices. This product is essential for industries and research institutions requiring advanced analytical capabilities, including environmental monitoring, geological surveying, nuclear fuel cycle analysis, and high-purity material production.

Application

• Spectrophotometric Analysis: Primary reagent for the quantitative determination of thorium, uranium, and rare earth elements in ores, alloys, and environmental samples.
• Nuclear Industry: Used in the analysis of nuclear materials, including fuel rod composition and monitoring of actinides in process streams and waste.
• Geochemical Research: Critical for trace metal analysis in geological samples, aiding in mineral exploration and earth science studies.
• Environmental Monitoring: Detection and quantification of heavy metal pollutants, particularly lanthanides and actinides, in water and soil.
• High-Purity Material Production: Serves as a key analytical tool for quality control in the manufacturing of specialty metals, ceramics, and phosphors.
• Academic & Research Laboratories: A standard reagent in analytical chemistry for teaching and developing new complexometric titration and spectroscopic methods.

Basic Information

Product Name	Arsenazo Iii
CAS No.	17306-35-3
Molecular Formula	C22H18As2N4O14S2
Molecular Weight	776.37 g/mol
Synonyms	Arsenazo III; 2,2'-[1,8-Dihydroxy-3,6-disulfo-2,7-naphthalene-bis(azo)]dibenzenearsonic Acid; 2,7-Bis(2-arsonophenylazo)chromotropic Acid; Neothoron; Uranon III; Thoronol; 3,6-Bis((2-arsonophenyl)azo)-4,5-dihydroxynaphthalene-2,7-disulfonic Acid
EINECS	241-322-4

Quality Control

Our Arsenazo III is manufactured under strict quality management systems to ensure batch-to-batch consistency and high performance. Each lot undergoes rigorous analytical testing, including spectrophotometric purity verification and heavy metal screening, to meet the exacting standards required for trace analysis. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment to support your quality assurance protocols.

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 light-sensitive nature, prolonged exposure to direct light should be avoided to maintain reagent stability and performance.

Specification

Item	Specification
Appearance	Dark brown to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Absorbance Ratio (A655/A620)	1.50 - 1.70
Sensitivity to Thorium	Conforms
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, violet solution

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