Trypan Blue Solution .4% Gibco™ 100 mL

Routinely used as a cell stain to assess cell viability using the dye exclusion test

Performed while counting cells with hemocytometer during routine subculturing, but can be performed any time cell viability needs to be determined quickly and accurately

Dye exclusion test is based upon concept that viable cells do not take up impermeable dyes (like Trypan Blue), but dead cells are permeable and take up the dye