Description

4-Oxo-Tempo is a stable nitroxyl radical derivative, widely recognized as a versatile spin label and spin trap in scientific research. Its core value lies in its ability to act as a potent antioxidant and a reliable probe for studying free radical processes and oxidative stress. This compound is essential for researchers and formulators in the pharmaceutical, polymer, and material science industries. It is particularly valuable for applications in electron paramagnetic resonance (EPR) spectroscopy and as an inhibitor in radical polymerization.

Application

• EPR Spectroscopy & Spin Labeling: Serves as a stable radical probe for investigating molecular dynamics, membrane fluidity, and protein structure.
• Polymer Science: Acts as a mediator in controlled radical polymerization (e.g., Nitroxide-Mediated Polymerization, NMP) and as an antioxidant stabilizer for polymers.
• Biomedical Research: Used as a spin trap to detect and quantify short-lived free radicals (e.g., superoxide, hydroxyl) in biological systems, aiding in the study of oxidative stress.
• Antioxidant Studies: Functions as a model compound to evaluate antioxidant mechanisms and efficacy in various chemical and biological contexts.
• Material Functionalization: Employed to introduce nitroxyl functionality onto surfaces or into materials for creating smart, responsive systems.
• Catalysis: Utilized as a co-catalyst or redox mediator in selective oxidation reactions.

Basic Information

Product Name	4-Oxo-Tempo
CAS No.	2896-70-0
Molecular Formula	C9H16NO2
Molecular Weight	170.23 g/mol
Synonyms	4-Oxo-2,2,6,6-tetramethylpiperidine-1-oxyl; 4-Oxo-TEMPO; 4-Oxo-2,2,6,6-tetramethylpiperidin-1-yloxy; 4-Oxo-TEMPOL; 1-Oxyl-4-oxo-2,2,6,6-tetramethylpiperidine; 4-Oxo-2,2,6,6-tetramethylpiperidine N-oxyl; 4-OxoTEMPO; 4-Keto-TEMPO
EINECS	220-787-3

Quality Control

Our 4-Oxo-Tempo is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and purity determination. A Certificate of Analysis (COA) detailing specific results for identity, purity, and related substances is provided with every shipment to guarantee it meets your research and development specifications.

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). Keep away from strong reducing agents and incompatible materials.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	36 - 40 °C
Loss on Drying	≤ 0.5%

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