Description

Tempo CAS NO 2564-83-2 is a stable nitroxyl radical, specifically 2,2,6,6-Tetramethylpiperidin-1-oxyl, widely recognized as a highly effective and versatile catalyst and spin trap. This compound is crucial for facilitating controlled oxidation reactions in organic synthesis and serving as a paramagnetic probe in polymer and materials science. It is an essential reagent for R&D and production chemists in the pharmaceutical, polymer, and specialty chemical industries seeking efficient, selective, and stable radical-based processes.

Application

• Organic Synthesis Catalyst: Used as a catalyst in the selective oxidation of alcohols to carbonyl compounds, often in combination with co-oxidants.
• Polymerization Regulator: Acts as a stable radical for Nitroxide-Mediated Polymerization (NMP), enabling control over polymer architecture and molecular weight.
• Spin Labeling & EPR Studies: Serves as a stable spin label in Electron Paramagnetic Resonance (EPR) spectroscopy for probing molecular dynamics and structure in biological systems and materials.
• Antioxidant & Stabilizer: Functions as an antioxidant and radical scavenger in polymer formulations to inhibit degradation and extend material lifespan.
• Biochemical Research: Utilized as a spin trap to detect and study short-lived free radicals in enzymatic and metabolic pathways.
• Surface Modification: Employed to modify material surfaces by grafting polymer brushes via surface-initiated NMP techniques.

Basic Information

Product Name	Tempo
CAS No.	2564-83-2
Molecular Formula	C9H18NO
Molecular Weight	156.25 g/mol
Synonyms	2,2,6,6-Tetramethylpiperidin-1-oxyl; TEMPO; 2,2,6,6-Tetramethyl-1-piperidinyloxy, Free Radical; (2,2,6,6-Tetramethylpiperidin-1-yl)oxidanyl; TEMPOL (common name for related hydroxy derivative); Stable Nitroxyl Radical; 1-Oxyl-2,2,6,6-tetramethylpiperidine
EINECS	219-910-3

Quality Control

Our Tempo (CAS 2564-83-2) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for research and industrial applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). The product is stable under these conditions but should be kept away from strong reducing agents.

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%
Residue on Ignition	≤ 0.1%

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