β-Lactamase, Bacillus cereus 569/H9 Form Lyophilized Molar mass 31500 Unit definition One unit is defined as the amount of enzyme that will hydrolyze 1.0 µmol benzyl penicillin and 1.0 µmol of cephalosporin C, respectively, per min at 25°C. Activity β-lactamase I: ≥500 units/vial; β-lactamase II: ≥50 units/vial Solubility H2O EC number 3.5.2.6 RTECS OD2265000 CAS number 9073-60-3 Merck USA index 14, 7093 商店和运输信息 Storage -20°C Ship Ambient Temperature Only Harmful