Description

Thorin Sodium CAS NO 132-33-2 is the sodium salt of thorin, a sensitive metallochromic indicator and complexometric reagent. This compound is valued for its selective colorimetric properties, enabling precise analytical detection and quantification of specific metal ions. It is primarily required by analytical laboratories, quality control facilities, and research institutions engaged in environmental monitoring, metallurgical analysis, and chemical manufacturing.

Application

• Spectrophotometric Determination of Thorium and Zirconium: Acts as a highly sensitive and selective chromogenic agent for the colorimetric analysis of thorium and zirconium ions in solution.
• Complexometric Titration Indicator: Used as an endpoint indicator in EDTA titrations for various metal ions, providing a sharp color change.
• Analytical Reagent in Geological Assays: Employed in the analysis of ores and minerals for the presence of rare earth and heavy metal elements.
• Research & Development: Serves as a key reagent in chemical research for studying metal-ligand interactions and developing new analytical methodologies.
• Water and Environmental Testing: Utilized in procedures to detect and measure trace metal contaminants in water and soil samples.
• Pharmaceutical Analysis: Applied in certain niche analytical methods for impurity profiling or catalyst residue testing.

Basic Information

Product Name	Thorin Sodium
CAS No.	132-33-2
Molecular Formula	C16H11AsN2Na2O10S2
Molecular Weight	576.29 g/mol
Synonyms	Thorin; Sodium Thorin; Thoron; Thoronol; 2-(2-Hydroxy-3,6-disulfo-1-naphthylazo)benzenearsonic Acid Disodium Salt; 1-(2-Arsonophenylazo)-2-naphthol-3,6-disulfonic Acid Disodium Salt; APANS; Beryllon II
EINECS	205-058-6

Quality Control

Our Thorin Sodium is produced and tested under a stringent quality management system. Each batch is analyzed to ensure high purity and consistent performance as an analytical reagent. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided to guarantee compliance with your methodological requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from incompatible materials. Due to its light-sensitive nature, prolonged exposure to light should be avoided to maintain reagent stability.

Specification

Item	Specification
Appearance	Dark red to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Solubility	Soluble in water
pH (1% Solution)	6.0 - 8.0

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