Description

Nitroxide, 4-Carboxyphenyl Hydroxy (9Ci) is a specialized nitroxide radical derivative featuring a carboxylic acid functional group. This bifunctional structure makes it a valuable intermediate and spin probe in advanced materials and life science research. It is particularly sought after by R&D teams in the polymer and pharmaceutical sectors for its dual reactivity and paramagnetic properties. The compound is supplied to meet the stringent requirements of industrial and academic laboratories globally.

Application

• As a polymerization regulator and nitroxide-mediated polymerization (NMP) agent for controlled radical polymerization processes.
• As a spin label and EPR (Electron Paramagnetic Resonance) probe for studying molecular dynamics and structure in biophysical chemistry.
• As a key chemical intermediate for synthesizing more complex nitroxide radicals and functional materials.
• In the development of advanced functional polymers with specific properties like self-healing or stimuli-responsiveness.
• For research into antioxidant mechanisms and as a model compound in free radical chemistry studies.
• Potential use in the surface functionalization of nanoparticles and other nanomaterials.

Basic Information

Product Name	Nitroxide, 4-Carboxyphenyl Hydroxy (9Ci)
CAS No.	58684-14-3
Molecular Formula	C8H8NO4
Molecular Weight	182.15 g/mol
Synonyms	4-Carboxy-2,2,6,6-tetramethylpiperidine-1-oxyl; 4-Carboxy-TEMPO; 4-Carboxy-2,2,6,6-tetramethylpiperidin-1-oxyl; 4-Carboxy-2,2,6,6-tetramethylpiperidin-1-oxy; 4-Carboxy-TEMPO Radical; 4-Carboxyphenyl Hydroxy Nitroxide; 4-Carboxy-2,2,6,6-tetramethyl-1-piperidinyloxy
EINECS	Contact for details

Quality Control

Our Nitroxide, 4-Carboxyphenyl Hydroxy (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing specific results for purity, assay, and impurity profiles are available upon request, supporting compliance with research and industrial application standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (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 powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%

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