Trypan Blue is widely used in biological laboratories as a dye for staining cells to assist in their analysis. There are several synonyms for Trypan Blue, including diamine blue, diamine blue B, soluble blue, Savannah blue and Columbus blue. These synonyms are often used interchangeably with Trypan Blue in scientific literature, and all refer to the same chemical compound: a blue-colored azo dye that binds to proteins in living cells but does not penetrate dead ones. Trypan Blue is used most commonly for cell viability tests and to discriminate between living and dead cells, making it a valuable tool in cell biology and medical research.