Our ViaCheck™ standards mimic the characteristics of live and dead cells in the trypan blue dye exclusion method and may be used to support validation and QC of image-based cell viability analyzers (e.g. Vi-CELL®) used in biomanufacturing programs. ViaCheck™ Viability Controls are supplied at ~1.0 x 106 beads / mL and are available in a range of live/dead ratios. ViaCheck™ Concentration Controls are supplied at the noted concentrations.