4-Trimethylammonium-2,2,6,6-tetramethylpiperidine-1-oxyl iodide

4-Trimethylammonium-2,2,6,6-tetramethylpiperidine-1-oxyl iodide (also known as CAT 1) is a positively charged, cell-impermeable nitroxide spin label and stable free radical derivative of TEMPO.

CAT-1 possesses a permanent positive net charge from the trimethylammonium group, rendering it membrane-impermeable (cell-impermeable), which distinguishes it from cell-permeable analogs.

It is used in electron paramagnetic resonance (EPR) spectroscopy to study membrane surfaces, cellular environments, and oxygen concentrations inside specific biological compartments like phagosomes.

CoA BC294

MSDS BC294