Activity: Each vial contains 500 units β-Lactamase I and 50 units β-Lactamase II Unit Definition: One unit is defined as the amount of enzyme which will hydrolyse 1,0 micromole of benzyl penicillin and 1,0 micromole of cephalosporin C per minute at 25 °C in the presence of EDTA pH 7,0.

E.C. 3.5.2.6
Lyophilised solid