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Thermo Scientific Chemicals
4-Hydroxy-TEMPO, free radical, 98+%
CAS: 2226-96-2 | C9H18NO2
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Catalog number A12497.14
also known as A12497-14
Price (USD)
317.65
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Online exclusive
Ends: 30-Jun-2026
373.00Save 55.35 (15%)
Each
Quantity:
25 g
Price (USD)
317.65
Special offer
Online exclusive
Ends: 30-Jun-2026
373.00Save 55.35 (15%)
Each
Chemical Identifiers
CAS2226-96-2
IUPAC Name(4-hydroxy-2,2,6,6-tetramethylpiperidin-1-yl)oxidanyl
Molecular FormulaC9H18NO2
InChI KeyUZFMOKQJFYMBGY-UHFFFAOYSA-N
SMILESCC1(C)CC(O)CC(C)(C)N1[O]
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Specifications
Specification Sheet
Specification SheetFormCrystals or powder or crystalline powder or flakes
Assay (GC)≥98.0%
Melting Point (clear melt)68.0-75.0°C
Appearance (Color)Orange
Identification (FTIR)Conforms
Superoxide scavenger with neuroprotective, anti-inflammatory and analgesic effects4-Hydroxy-TEMPO free radical is used as a catalyst and a chemical oxidant by virtue of being a stable radical. It is used for detoxifying reactive oxygen species in medicinal chemistry. It is involved in the catalysis of disproportionation of superoxide and facilitates hydrogen peroxide metabolism. It is used to prepare tris(2,2,6,6-tetramethyl-1-oxyl-4-piperidyloxy)trimellitate by reacting with benzene-1,2,4-tricarbonyl trichloride. Further, it is used as a free radical scavenger and exhibits neuroprotective, anti-inflammatory and analgesic effects. In addition to this, it has good inhibition effect to acrylic acid esters, methyl acrylate, acrylic acid, acrylonitrile, styrene and butadiene.
This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.
Applications
Superoxide scavenger with neuroprotective, anti-inflammatory and analgesic effects4-Hydroxy-TEMPO free radical is used as a catalyst and a chemical oxidant by virtue of being a stable radical. It is used for detoxifying reactive oxygen species in medicinal chemistry. It is involved in the catalysis of disproportionation of superoxide and facilitates hydrogen peroxide metabolism. It is used to prepare tris(2,2,6,6-tetramethyl-1-oxyl-4-piperidyloxy)trimellitate by reacting with benzene-1,2,4-tricarbonyl trichloride. Further, it is used as a free radical scavenger and exhibits neuroprotective, anti-inflammatory and analgesic effects. In addition to this, it has good inhibition effect to acrylic acid esters, methyl acrylate, acrylic acid, acrylonitrile, styrene and butadiene.
Solubility
Soluble in water, ethanol, methanol and dimethyl sulfoxide.
Notes
Store in a cool place. Incompatible with strong oxidizing agents.
Superoxide scavenger with neuroprotective, anti-inflammatory and analgesic effects4-Hydroxy-TEMPO free radical is used as a catalyst and a chemical oxidant by virtue of being a stable radical. It is used for detoxifying reactive oxygen species in medicinal chemistry. It is involved in the catalysis of disproportionation of superoxide and facilitates hydrogen peroxide metabolism. It is used to prepare tris(2,2,6,6-tetramethyl-1-oxyl-4-piperidyloxy)trimellitate by reacting with benzene-1,2,4-tricarbonyl trichloride. Further, it is used as a free radical scavenger and exhibits neuroprotective, anti-inflammatory and analgesic effects. In addition to this, it has good inhibition effect to acrylic acid esters, methyl acrylate, acrylic acid, acrylonitrile, styrene and butadiene.
Solubility
Soluble in water, ethanol, methanol and dimethyl sulfoxide.
Notes
Store in a cool place. Incompatible with strong oxidizing agents.
RUO – Research Use Only
General References:
- Reviews: Synthesis and reactions of stable nitroxyl radicals: Synthesis, 190, 401 (1971); Advances in the chemistry of nitroxide spin labels: Chem. Rev., 78, 37 (1978); Recent advances in the chemistry of nitroxides and their applications in spin labelling: J. Sci. Ind. Res., 54, 623 (1995). For a brief feature on derived oxoammonium salts, see: Synlett, 1757 (2003).
- Compare also 4-Acetamido-TEMPO, B23456 and TEMPO, A12733.
- Recommended as a stabilizer (antioxidant) for the protection of unsaturated fatty acids and their derivatives: J. Am. Chem. Soc., 101, 6748 (1979).
- żamojć, K.; Wiczk, W.; Zaborowski, B.; Jacewicz, D.; Chmurzyński, L. Analysis of Fluorescence Quenching of Coumarin Derivatives by 4-Hydroxy-TEMPO in Aqueous Solution. J. Fluoresc. 2014, 24 (3), 713-718.
- żamojć, K.; Zdrowowicz, M.; Wiczk, W.; Jacewicz, D.; Chmurzyński, L. Dihydroxycoumarins as highly selective fluorescent probes for the fast detection of 4-hydroxy-TEMPO in aqueous solution. RSC Adv. 2015, 5 (78), 63807-63812.
- Sunkaria, A.; Sharma, D. R.; Wani, W. Y.; Gill, K. D. Attenuation of Dichlorvos-Induced Microglial Activation and Neuronal Apoptosis by 4-Hydroxy TEMPO. Mol. Neurobiol. 2014, 49 (1), 163-175.