Description

2,2,5,5-Tetramethyl-3-Imidazoline-1-Oxyl-Carboxylic Acid, Sodium Salt, Free Radical is a stable nitroxide radical compound, valued for its paramagnetic properties and role as a spin label or spin trap. This chemical is essential for probing molecular structure, dynamics, and interactions in complex systems through techniques like Electron Paramagnetic Resonance (EPR) spectroscopy. It is primarily needed by researchers and manufacturers in the life sciences, polymer chemistry, and materials science sectors for advanced analytical and synthetic applications.

Application

• Spin Labeling in Biophysics & Structural Biology: Used to tag proteins, nucleic acids, and membranes to study conformational changes, distances, and dynamics via EPR spectroscopy.
• Polymer Science & Materials Research: Acts as a radical probe for investigating polymerization kinetics, polymer chain mobility, and the microstructure of advanced materials.
• Antioxidant & Radical Scavenging Studies: Serves as a stable radical standard or a spin trap to detect and quantify reactive oxygen species (ROS) in biochemical and pharmaceutical research.
• Magnetic Resonance Imaging (MRI) Contrast Agent Development: Explored as a component in the design of novel paramagnetic contrast agents for enhanced imaging.
• Catalysis & Organic Synthesis: Employed as a catalyst or mediator in controlled radical polymerization processes and selective oxidation reactions.
• Quality Control in Industrial Processes: Utilized as a standard or probe to monitor radical processes and degradation in chemical manufacturing.

Basic Information

Product Name	2,2,5,5-Tetramethyl-3-Imidazoline-1-Oxyl-Carboxylic Acid, Sodium Salt, Free Radical
CAS No.	33156-75-1
Molecular Formula	C9H14N2O3Na
Molecular Weight	221.21 g/mol
Synonyms	3-Carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxy, Sodium Salt; Sodium 3-Carboxy-2,2,5,5-tetramethylpyrrolidine-1-oxyl; Carboxy-PROXYL, Sodium Salt; 3-Carboxy-PROXYL, Sodium Salt; Sodium 3-Carbamoyl-2,2,5,5-tetramethyl-1-pyrrolidinyloxy; 1-Oxyl-2,2,5,5-tetramethyl-3-carboxypyrrolidine Sodium Salt; 3-Carboxy-2,2,5,5-tetramethylpyrrolidin-1-oxyl Sodium Salt; PCA (Carboxyl-PROXYL) Sodium Salt
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Each batch is characterized to confirm identity, purity, and radical content, with specifications tailored for research and industrial use. Certificates of Analysis (COA) detailing assay, impurity profile, and spectroscopic data are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store at controlled room temperature (15-25°C) under an inert atmosphere (e.g., nitrogen or argon) to minimize oxidation. Keep the container in a cool, dry, and well-ventilated place away from incompatible materials.

Specification

Item	Specification
Appearance	Orange to red powder or crystals
Identification (IR)	Conforms to structure
Identification (EPR)	Characteristic triplet signal
Assay (HPLC)	≥ 95.0%
Radical Content (EPR)	≥ 90%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 1.0%
Heavy Metals	≤ 20 ppm

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