Colorimetric Cell Viability Assay

**Semantic type:** Research Activity

**Definition:** A colorimetric assay that can assess the viability of cells by quantitation of the reduction of a yellow tetrazolium salt substrate to a product that has a purple color. This assay can measure the cytotoxicity of a chemical or drug by determining the affect of treatment on cell viability.

**Synonyms:** - MTS Assay - MTT Assay