3',6'-Di(O-thiosalicyl)fluorescein. SSP4 (Sulfane Sulfur Probe 4) is a novel fluorescent probe to detect sulfane sulfurs selectively.
SSP4 (Sulfane Sulphur Probe 4) is a novel fluorescent probe to detect sulfane sulphurs selectively. SSP4 itself is non-fluorescent, but it emits strong green fluorescence when it reacts with sulfane sulphurs. Thus, SSP4 enables high sensitive fluorescence detection and imaging of sulfane sulphurs.