Molekula
Tempo free radical (2,2,6,6-Tetramethylpiperidinooxy)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Tempo free radical (2,2,6,6-Tetramethylpiperidinooxy) is a stable nitroxide compound widely used as a polymerization inhibitor and as a mediating agent in nitroxide-mediated polymerization, a spin trap in electron paramagnetic resonance (EPR) spectroscopy, and a catalyst in organic synthesis. It is also employed in studies of radical mechanisms and as a radical scavenger in organic chemistry for trapping carbon-centred radicals. This chemical has a CAS number of 2564-83-2, with a molecular formula of C9H18NO and a molecular weight of 156.25. It must be stored between 2 to 8 °C and carries a signal word of "Danger" due to its hazardous properties. Molekula supplies Tempo free radical from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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100 g — £46.50 per pack ex VAT · £55.80 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Reddish brown crystal |
| Water | <1% |
| Ash | <0.1% |
| Identification | Positive |
| Assay (GC) | >98.5% |
| MP | 36 to 40 ° C |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Flash Point | 67 °C |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Vapour Pressure | 0.000006 mmHg |
Source: PubChem CID 2724126 (Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 64132071 |
| CAS Number | 2564-83-2 |
| EC Number | 219-888-8 |
| Molecular Formula | C9H18NO |
| Molecular Weight | 156.25 |
| Exact Mass | 156.1388 |
| SMILES | CC1(CCCC(N1[O])(C)C)C |
| InChIKey | QYTDEUPAUMOIOP-UHFFFAOYSA-N |
| InChI | InChI=1S/C9H18NO/c1-8(2)6-5-7-9(3,4)10(8)11/h5-7H2,1-4H3 |
| PubChem CID | 2724126 |
| UN Number | UN3263 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933.39.9200 |
| Tariff Code | 2933399999 |
Safety & GHS
-
Corrosive
GHS05
Hazard statements
- H290 May be corrosive to metals
- H314 (sub cat. 1C) Causes severe skin burns and eye damage
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P234 Keep only in original container
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1-Piperidinyloxy, 2,2,6,6-tetramethyl-
- 2,2,6,6-Tetramethyl-1-piperidinyloxy
- 2,2,6,6-tetramethyl-4-piperidine-N-oxide
- 2,2,6,6-Tetramethylpiperidine-1-oxyl
- 2,2,6,6-Tetramethylpiperidinooxy
- Tanan
- Tanane
- TEMPO
- Tetramethylpiperidine nitroxide
- Tetramethylpiperidinooxy
Frequently asked questions
What is Tempo free radical (2,2,6,6-Tetramethylpiperidinooxy) commonly used for?
Tempo free radical is primarily used as a stable nitroxide radical for electron paramagnetic resonance (EPR) spectroscopy, spin-labeling studies, and as a catalyst in organic synthesis.
What is the chemical formula and molecular weight of Tempo free radical?
The chemical formula is C₉H₁₈NO, and the molecular weight is 156.25 g/mol.
How should Tempo free radical be stored?
Store at 2–8 °C in a cool, dry place, protected from light and moisture to maintain stability.
What purity grades or forms of Tempo free radical does Molekula supply?
Molekula supplies high-purity (≥98%) crystalline Tempo free radical suitable for research and analytical applications.
Can Molekula supply Tempo free radical in bulk quantities?
Yes, Molekula can provide Tempo free radical in bulk, with quantities tailored to your research or production needs—please contact us for pricing and availability.
What documentation comes with an order of Tempo free radical?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet detailing purity, stability, and handling instructions.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.