Spin Trapping Reagents

Spin trapping reagents are useful in ESR/EPR spectroscopy to detect and identify short-lived radicals. In general, the spin trapping reagent reacts with the radical to form a spin adduct that is more stable than the original free radical and can be spectroscopically analyzed afterwards with ESR/EPR spectroscopy. In some cases, the resulting adduct is also stable enough for analysis with other methods, such as NMR.

Most frequently, nitrones such as DMPO (5,5-Dimethyl-1-pyrroline N-oxide) or PBN (N-tert-Butyl-α-phenylnitrone) are used as spin traps but nitroso compounds also have been successfully applied to stabilize free radicals.

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80126 N-tert-Butyl-α-phenylnitrone for ESR-spectroscopy
292664 N-tert-Butyl-α-(2-sulfophenyl)nitrone sodium salt 95%
01872 CYPMPO for ESR-spectroscopy, ≥97%
92688 5,5-Dimethyl-1-pyrroline N-oxide for ESR-spectroscopy
443700 Ethyl 4,4,4-trifluorobutyrate ≥98%
53928 4-Hydrazonomethyl-1-hydroxy-2,2,5,5-tetramethyl-3-imidazoline-3-oxide ≥95.0% (NT)
215430 α-(4-Pyridyl N-oxide)-N-tert-butylnitrone 99%
85180 Silver diethyldithiocarbamate ACS reagent, for the determination of As, ≥99.0%
71480 Sodium diethyldithiocarbamate trihydrate ACS reagent, for the determination and separation of heavy metals, ≥99.0%
244007 3,3,5,5-Tetramethyl-1-pyrroline N-oxide 95%
95851 1,3,5-Tri-tert-butyl-2-nitrosobenzene for ESR-spectroscopy, >98.0% (HPLC)