The stain is also used in the preparation of Foraminifera for microscopic analysis, allowing the distinction between forms that were alive or dead at the time of collection.
A form of Rose Bengal is also being studied as a treatment for certain cancers. The company, Provectus Pharmacuticals, renamed the drug PV-10 and is currently undergoing clinical trials for melanoma.
Rose Bengal is also used in synthetic chemistry to generate singlet oxygen from triplet oxygen. The singlet oxygen can then undergo a variety of useful reactions, particularly [2 + 2] cycloadditions with alkenes and similar systems.