Description

2-(2-Pyridylazo) Chromotropic Acid Disodium Salt is a high-purity analytical reagent and complexometric indicator. This compound is valued for its selective and sensitive colorimetric response to specific metal ions, making it a critical tool for precise quantitative analysis. It is primarily required by analytical laboratories, quality control departments, and research institutions in the chemical, environmental, and pharmaceutical sectors for trace metal detection and complexometric titrations.

Application

• Spectrophotometric Reagent: Used for the sensitive colorimetric determination of trace metals such as cobalt, nickel, and copper in aqueous solutions.
• Complexometric Indicator: Serves as a metallochromic indicator in EDTA titrations for the analysis of various metal ions.
• Environmental Analysis: Employed in testing water and soil samples for heavy metal contamination and environmental monitoring.
• Pharmaceutical QC: Applied in the analysis of raw materials and finished products for metallic impurity content.
• Industrial Process Control: Utilized for monitoring metal ion concentrations in chemical manufacturing and plating bath solutions.
• Research & Development: A key reagent in academic and industrial research involving coordination chemistry and analytical method development.

Basic Information

Product Name	2-(2-Pyridylazo) Chromotropic Acid Disodium Salt
CAS No.	2113-70-4
Molecular Formula	C16H9N4Na2O8S2
Molecular Weight	510.36 g/mol
Synonyms	2-(2-Pyridylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic Acid Disodium Salt; 2-(2-Pyridylazo)chromotropic Acid Disodium Salt; PAC Disodium Salt; 2,2'-Pyridylazochromotropic Acid Disodium Salt; 2-(Pyridin-2-yldiazenyl)chromotropic Acid Disodium Salt; 1,8-Dihydroxy-2-(2-pyridylazo)naphthalene-3,6-disulfonic Acid Disodium Salt; Chromotropic Acid 2-Pyridylazo Derivative Disodium Salt
EINECS	218-292-5

Quality Control

Our 2-(2-Pyridylazo) Chromotropic Acid Disodium Salt is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for analytical applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and physical properties 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). Due to its hygroscopic nature, the container must be kept tightly sealed in a low-humidity environment to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	Dark red to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Solubility (in Water)	Clear, red solution
Heavy Metals (as Pb)	≤ 20 ppm

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