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Home » Products » Pharmaceutical Intermediates » 4-Hydroxy-2,2,6,6-Tetramethyl-piperidinyloxy

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4-Hydroxy-TEMPO or TEMPOL, formally 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl, is a heterocyclic compound.
Like the related TEMPO, it is used as a catalyst and chemical oxidant by virtue of being a stable aminoxyl radical.
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Name 4-Hydroxy-TEMPO Free Radical
Category Pharmaceutical intermediates
Annual capacity 500mTs
Stock information Mass production, always have stock
Basic Information
Synonyms 4-Hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl,TEMPOL;

2,2,6,6-Tetramethyl-4-hydroxy-1-piperidinyloxy radical;

4-Hydroxy-2,2,6,6-Tetramethyl-piperidinyloxy ;



4-Hydroxy-TEMPO free radical;

CAS number 2226-96-2
EINECS 218-760-9
Formula  C9H18NO2
Structure 2226-96-2
Molecular Weight 172.24
Storage temp. 2-8°C
PH  8.2 (20g/l, H2O, 20℃)
Boiling Point 302.58°C
BRN   1422990
COA Information
Apperance Orange Crystal
Purity min. 99.0%
Moisture max. 0.5%
Ash max. 0.1%
Safety Information
Hazard Codes   Xn,Xi
WGK Germany 1
RTECS   TN8991000
Risk Statements 22-36/37/38-36/38
HS Code   29333999
In biochemical research, 4-Hydroxy-TEMPO Free Radical has been investigated as an agent for limiting reactive oxygen species. It catalyzes the disproportionation of superoxide, facilitates hydrogen peroxide metabolism, and inhibits Fenton chemistry.