Unit of Arbitrary Substance Concentration ICH Unit of Measure Terminology Kallikrein Inactivator Unit per Milliliter Kallikrein_Inactivator_Unit_per_Milliliter kallikrein inactivator unit/millilitre Kallikrein Inactivator Unit per Milliliter Kallikrein Inactivator Unit/Milliliter C1690008 KIU/mL KIU/ml Kallikrein Inhibitor Unit per Milliliter Kallikrein Inactivator Unit per Milliliter Quantitative Concept An arbitrary unit of a kallikrein inactivator concentration equal to the concentration at which one milliliter of the mixture contains one unit of the kallikrein inactivator. C73531 ICH