Rhodamine B isothiocyanate is a mixture of isomers for fluorescence applications including fluorescent marking of proteins. It is derivatite of phenolphtalein.

Rhodamine B isothiocyanate (RBITC), an organic fluorescence dye, is widely used as a fluorescent tag in biological applications

36877-69-7

C29H30ClN3O3S

536.08

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years