Description

15-Crown-4 [4-(2,4-Dinitrophenylazo)Phenol] is a specialized crown ether derivative that combines the selective cation-binding properties of a macrocyclic ether with a chromogenic azo dye functionality. This unique molecular architecture makes it a critical reagent for the selective complexation and colorimetric detection of alkali metal ions, particularly sodium (Na⁺), in analytical and research settings. It is primarily utilized by researchers and quality control laboratories in the pharmaceutical, chemical synthesis, and environmental analysis sectors for developing sensitive ion-selective sensors and extraction protocols.

Application

• Ion-Selective Electrodes & Sensors: Acts as a key ionophore in the fabrication of membrane electrodes for the potentiometric detection of sodium ions.
• Chromogenic Reagent for Analysis: Used in colorimetric assays and test kits for the visual or spectroscopic quantification of specific metal cations in solution.
• Phase Transfer Catalyst: Facilitates the transfer of ionic species between aqueous and organic phases in synthetic organic chemistry, enhancing reaction rates and yields.
• Metal Ion Extraction & Separation: Employed in liquid-liquid extraction processes to selectively separate and concentrate alkali metals from complex mixtures.
• Research & Development: Serves as a model compound in supramolecular chemistry studies investigating host-guest interactions and molecular recognition.
• Pharmaceutical Analysis: Potential use in analytical methods for monitoring sodium levels or related ionic impurities in drug substances and formulations.

Basic Information

Item	Details
Product Name	15-Crown-4 [4-(2,4-Dinitrophenylazo)Phenol]
CAS No.	81238-57-5
Molecular Formula	C₂₂H₂₆N₄O₈
Molecular Weight	474.47 g/mol
Synonyms	4-[(2,4-Dinitrophenyl)azo]-15-crown-4-phenol; 15-Crown-4-azophenol dye; 4-(2,4-Dinitrophenylazo)-15-crown-4; Sodium ionophore I; Chromoionophore I; Azo-crown ether derivative; 1,4,7,10-Tetraoxacyclododec-11-yl-[(2,4-dinitrophenyl)hydrazono]methyl]phenol
EINECS	Contact for details

Quality Control

Every batch of 15-Crown-4 [4-(2,4-Dinitrophenylazo)Phenol] is produced and tested under a strict quality management system. We ensure high purity and batch-to-batch consistency through advanced analytical techniques including HPLC, NMR, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your research and quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm
Solubility Test	Soluble in common organic solvents (e.g., DMSO, DMF, Chloroform)

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