title: Studies on stability of drugs in frozen systems. IV. The stability of benzylpenicillin sodium in frozen aqueous solutions.
mesh_terms: D002021:Buffers; D002951:Citrates; D004355:Drug Stability; D005615:Freezing; D006863:Hydrogen-Ion Concentration; D008722:Methods; D010400:Penicillin G; D010710:Phosphates
chemical_list: D002021:Buffers; D002951:Citrates; D010710:Phosphates; D010400:Penicillin G