CAS 3520-42-1 Sulforhodamine B (SRB, CI Acid Red 52) ndi utoto wofiira wa cationic oxygenanthraquinone fluorescent. Ndi ufa wofiira wakuda wokhala ndi madzi osungunuka bwino. Kuchuluka kwake koyamwa ndi 565 nm ndipo kutulutsa kwake kwakukulu ndi 586 nm. Uli ndi mphamvu yotha kuwala bwino. Mu mkhalidwe wopanda asidi, umatha kuphatikizana ndi ma amino acid oyambira mkati mwa maselo ndipo sungalowe mu nembanemba ya selo. Mankhwalawa amagwiritsidwa ntchito kwambiri mu njira yakale ya SRB m'munda wofufuza zasayansi, pochita kafukufuku wapamwamba wa kuchuluka kwa maselo mu vitro ndi mankhwala oletsa chotupa. Ungagwiritsidwenso ntchito popaka utoto wa fluorescence m'magawo a minofu ndi kutsata kwa fluorescence m'madzi. Nthawi yomweyo, monga utoto wa acidic, ungagwiritsidwe ntchito popaka utoto ubweya, silika, nayiloni ndi nsalu zina komanso chikopa ndi pepala.