Description

4-(2-Pyridylazo)Resorcinol is a heterocyclic azo compound widely recognized as a sensitive and selective chromogenic reagent for metal ion detection. Its primary value lies in its ability to form stable, intensely colored complexes with various transition and heavy metals, making it indispensable for analytical chemistry applications. This product is essential for research laboratories, quality control facilities, and industrial operations requiring precise metal quantification, particularly for elements like cobalt, nickel, and zinc.

Application

• Spectrophotometric Reagent: Used as a chromogenic agent for the quantitative determination of metal ions (e.g., Co²⁺, Ni²⁺, Zn²⁺, Cd²⁺) in UV-Vis spectroscopy.
• Analytical Chemistry: Serves as a complexometric indicator and chelating agent in titrations and trace metal analysis.
• Environmental Testing: Employed in the analysis of water, soil, and industrial effluent samples for heavy metal contamination.
• Pharmaceutical Analysis: Utilized in the assay and impurity profiling of drug substances and excipients for metal catalyst residues.
• Industrial Process Control: Applied for monitoring metal ion concentrations in electroplating baths, alloy production, and catalyst streams.
• Research & Development: A key reagent in developing new analytical methods, sensor materials, and separation techniques in academic and industrial R&D.

Basic Information

Product Name	4-(2-Pyridylazo)Resorcinol
CAS No.	1141-59-9
Molecular Formula	C₁₁H₉N₃O₂
Molecular Weight	215.21 g/mol
Synonyms	PAR; 4-(2-Pyridylazo)resorcinol; 1-(2-Pyridylazo)-2,4-dihydroxybenzene; 2,4-Dihydroxy-1-(2-pyridylazo)benzene; 2-(2,4-Dihydroxyphenylazo)pyridine; Pyridylazonaphthol (related class); PAR reagent; 4-(2-Pyridylazo)-1,3-benzenediol
EINECS	214-524-9

Quality Control

Our 4-(2-Pyridylazo)Resorcinol is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity, consistent performance, and compliance with relevant standards for analytical reagents. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee reliable and reproducible results in your applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 15-25°C). This material is light-sensitive (store away from light). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Orange to red-brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	190°C - 195°C (with decomposition)
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Suitability Test (for Co²⁺)	Passes test

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