Methyl 10-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-9-methoxy-3-oxo-3H-benzo[f]chromene-2-carboxylate

CAS 137350-66-4

ThioGlo 1 turns thiol chemistry into a stronger fluorescent signal. The reagent registered as CAS 137350-66-4 reacts with accessible thiol groups to form fluorescent derivatives, supporting analysis of compounds such as reduced glutathione and protein thiols. Yet group reactivity is not automatic identification of one molecule. Other sample components can contribute or interfere, so calibration and separation remain important. Published studies have integrated the labeling reaction into glutathione analysis and used chromatography to distinguish interfering sulfite-derived fluorescence in beer samples. The lesson extends beyond this reagent: an optical signal needs a chemical explanation. ThioGlo 1 supplies a useful reaction, while the surrounding analytical method establishes what the resulting light can tell us about the particular sample under investigation with confidence.