Ampicillin Solution, 50mg/ml, is a convenient, ready to use concentrated solution for molecular biology selection applications. It belongs to the group of beta-lactam antibiotics. These antibotics gram-negative bacteria to which E. coli and Salmonella belong. Beta-lactam antibiotic prevent the formation of peptidoglycan, an essential building block of the cell membrane. Thus, preventing growth of cells.||• Sterile-filtered using validated 0.2um membrane filters|• Molecular Biology Tested||Prepared from Ampicillin Sodium Salt:|Potency: |845-988ug/mg|Working Concentration:|20-50 ug/ml for E. coli|Identification A & B (I.R.):|To conform to USP|Sterility:|To conform to USP||pH (1%): 9.0±0.6||Solubility: |Colorless to light yellow, clear, complete.||Storage and Stablility:|May be stored at 4°C for short-term only. For long-term storage, store at -20°C