Trypsin solutions are used widely for dissociation of tissues and cell monolayers and we can deliver solutions that will perform consistently, batch after batch. The biochemical assays performed on Trypsin 1:250 determine both trypsin specific-activity at the level of certain co-purified enzymes that influence cell removal and viability. All trypsin solutions are prepared from porcine-parvovirus-tested and mycoplasma-tested materials. Formulation Contains 0.5% trypsin, 5.3mM EDTA , and 8.5 g/L NaCl. No phenol red. Sterile filtered.