Chemical Name: Piperidinooxy（TEMPO）

Chemical Synonyms: TEMPO,FREERADICAL;TEMPO;2,2',6,6'-Tetramethylpiperidin-1-oxyl;2,2,6,6-TETRAMETHYLPIPERIDINOOXY,FREERADICAL;2,2,6,6-TETRAMETHYLPIPERIChemicalbookDINOXY;2,2,6,6-TETRAMETHYLPIPERIDINOXYFREERADICAL;2,2,6,6-TETRAMETHYL-4-PIPERIDINYLOXY;2,2,6,6-TETRAMETHYLPIPERIDIN-1-OXYLFREERADICAL

CAS No.: 2564-83-2

Molecular Formula: C₉H₁₈NO

Molecular Weight: 156.25 g/mol

Product Overview

TEMPO (CAS 2564-83-2), chemically known as 2,2,6,6-Tetramethylpiperidine 1-oxyl, is a stable nitroxide radical widely used as a catalyst for the oxidation of alcohols and as a free radical scavenger in organic synthesis and polymer chemistry. It enables highly selective oxidation of primary alcohols to aldehydes or carboxylic acids, and secondary alcohols to ketones, under mild conditions . With assay ≥98% (GC), it is suitable for laboratory research and industrial synthesis applications.

Key Specifications

Applications

• Alcohol Oxidation Catalyst: Highly selective oxidation of primary alcohols to aldehydes or carboxylic acids, and secondary alcohols to ketones, using hypochlorite or other terminal oxidants .

• Free Radical Scavenger: Used as a radical trapping agent, polymerization inhibitor, and stabilizer in polymer and materials research .

• ESR/EPR Spectroscopy: Structural probe for electron spin resonance studies .

• Organic Synthesis: Catalyzes oxidation of sulfides to sulfoxides, and other selective transformations .

Important Safety Information

• Hazard Classification: Classified as Skin Corrosion/Irritation Category 1B (H314) and Serious Eye Damage (H318). Causes severe skin burns and eye damage .

• Handling Precautions: Wear protective gloves, protective clothing, eye protection, and face protection. Use in a well-ventilated area (fume hood). Avoid inhalation of dust and contact with skin and eyes .

• UN Number: UN3263 (Corrosive solid, acidic, organic, n.o.s.) .

• Storage: Store at 2–8 °C. Keep container tightly closed in a dry place. Protect from light .

Why Choose This Product

• High Purity: Assay ≥98% (GC), suitable for catalytic and synthetic applications requiring consistent radical activity.

• Well-Documented Reactivity: One of the most extensively studied nitroxide radicals, with established protocols for alcohol oxidation and radical trapping .

• Batch Consistency: Controlled production ensures reproducible catalytic performance.

• Full Documentation: COA and MSDS available upon request, including hazard classification and safe handling guidance.

Packaging & Storage

• Standard Packaging: 5 g / 25 g / 100 g / 500 g / 1 kg in amber glass bottles or aluminum foil bags, or customized packaging upon request.

• Storage Conditions: Store at 2–8 °C in a tightly closed container, protected from light and moisture. Inert gas (argon) recommended for long-term storage .

• Shelf Life: 24 months under proper storage conditions.