4-Hydroxy-2,2,6,6-tetramethyl-piperidinooxy
CAS Number: 2226-96-2
Chemical Formula: C9H18NO2
Synonyms: HYDROXY-TEMPO 4-HYDROXY-2,2,6,6-TETRAMETHYLPIPERIDINE-N-OXYL 4-HYDROXY-2,2,6,6-TETRAMETHYL-PIPERIDINOOXY FREE RADICAL
Appearance: Orange crystalline powder
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
4-Hydroxy-TEMPO is a multifunctional nitroxide free radical. It works as a highly efficient catalyst for oxidation reactions, a great stabilizer to prevent polymer decomposition, and a critical spin trapping reagent in biochemical studies. This high-purity product is well recognized for its strong stability and excellent performance.
Chemical Properties
| Item | Specification |
| Melting point | 69-71 °C(lit.) |
| Boiling point | 302.58°C (rough estimate) |
| density | 1.0402 (rough estimate) |
| vapor pressure | 0.025Pa at 20℃ |
| refractive index | 1.4350 (estimate) |
| Fp | 146°(295°F) |
| storage temp. | 2-8°C |
| solubility | 1670g/l |
| form | Crystals or Crystalline Powder |
| pka | 5.07[at 20 ℃] |
| color | Orange |
| PH | 8.2 (20g/l, H2O, 20℃) |
| Water Solubility | soluble |
| Merck | 14,9141 |
| BRN | 1422990 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | FAPCFNWEPHTUQK-UHFFFAOYSA-N |
| LogP | 0.56 at 25℃ |
| CAS DataBase Reference | 2226-96-2(CAS DataBase Reference) |
| NIST Chemistry Reference | 1-Piperidinyloxy, 4-hydroxy-2,2,6,6-tetramethyl-(2226-96-2) |
| EPA Substance Registry System | 1-Piperidinyloxy, 4-hydroxy-2,2,6,6-tetramethyl- (2226-96-2) |
Safety Information
| Item | Specification |
| Hazard Codes | Xn,Xi |
| Risk Statements | 22-36/37/38-36/38 |
| Safety Statements | 26-36-37/39-36/37/39-27 |
| WGK Germany | 1 |
| RTECS | TN8991000 |
| Autoignition Temperature | 260°C (DIN 51794) |
| TSCA | Yes |
| HS Code | 29333999 |
| Hazardous Substances Data | 2226-96-2(Hazardous Substances Data) |
| Toxicity | LD50 oral in rat: 1053mg/kg |
Product Application
Industrial Catalyst: It is a core catalyst used for selective oxidation of alcohols into carbonyl compounds such as aldehydes and ketones during chemical synthesis.
Polymer Stabilizer: It acts as an effective stabilizer and antioxidant that reduces thermal and oxidative breakdown of polymers and plastic materials.
Biochemical Research: It is widely used as a steady spin trap and marker in EPR spectroscopy to investigate free radicals and molecular movement.
Other Uses: It also works as an antioxidant in different systems and serves as a useful intermediate for making other nitroxide chemicals.
Supply & Delivery
Fast delivery time
Inventory: 2-3 working days
New production: 7-10 working days
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