Description

Nitroxide, p-Carboxyphenyl, Methyl Ester (8Ci) is a specialized nitroxide radical derivative, serving as a key intermediate and functional building block in advanced chemical synthesis. Its stable radical nature and ester functionality make it a valuable tool for polymer science and materials research, enabling precise control over reaction kinetics and material properties. This compound is essential for R&D and production in industries focused on developing high-performance polymers, spin-labeling agents, and specialty additives.

Application

• As a stable radical initiator or mediator in controlled/living radical polymerization (e.g., Nitroxide-Mediated Polymerization - NMP).
• As a spin label or probe in Electron Paramagnetic Resonance (EPR) spectroscopy for studying macromolecular dynamics and structure.
• As a key chemical intermediate in the synthesis of more complex nitroxide-based compounds and functional materials.
• In the research and development of advanced polymer materials with tailored properties for coatings, adhesives, or composites.
• For the preparation of bioconjugates in biochemical research where a stable radical tag is required.
• In the formulation of specialty additives where radical scavenging or stabilization properties are beneficial.

Basic Information

Product Name	Nitroxide, p-Carboxyphenyl, Methyl Ester (8Ci)
CAS No.	32514-16-2
Molecular Formula	C9H9NO4
Molecular Weight	195.17 g/mol
Synonyms	4-Carboxy-2,2,6,6-tetramethylpiperidine-1-oxyl methyl ester; Methyl 4-carboxy-2,2,6,6-tetramethylpiperidin-1-oxyl; TEMPO-4-carboxylic acid methyl ester; 4-Methoxycarbonyl-TEMPO; Methyl 4-(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)benzoate; p-Carboxyphenyl methyl ester nitroxide; 8Ci Nitroxide ester
EINECS	Contact for details

Quality Control

Our Nitroxide, p-Carboxyphenyl, Methyl Ester is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets high-purity standards suitable for research and industrial applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its sensitivity to light and propensity for oxidation, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term stability. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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