Spin trapping reagent. Cell permeable hydrophilic spin trap for both in vivo and in vitro studies of superoxide, O-, C-, S- and N- centered free radicals. Alternative Name: 5,5-Dimethyl-1-pyrroline-N-oxide. 2,2-Dimethyl-3,4-dihydro-2H-pyrrole 1-oxide. Formula: C6H11NO. MW: 113.16. CAS Number: 3317-61-1. Purity: ≥98% (ELSD). Appearance: Pale yellow solid or oil. Solubility: Soluble in water, 100% ethanol, methanol or DMSO. Long Term Storage: -20°C