4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 6-[(1,3-dioxo-3-phenoxy-2-phenylpropyl)amino]-3,3-dimethyl-7-oxo-, sodiumsalt (1:1), (2S,5R,6R)- (21649-57-0)

Its extinguishing agent are water, carbon dioxide, dry powder, foam. Carbenicillin phenyl sodium (CAS NO.21649-57-0)  in aqueous solution at 35 degrees and at 0.5 ionic strength were investigated. The reactions were followed by spectrophotometric assay , reversed-phase high-pressure liquid chromatography, and colorimetric assay . The degradation pathways were established, and the rate-pH profiles for ester and beta-lactam cleavage reactions are given for pH 1-11. Below pH 3, the beta-lactam degradation of the prodrugs proceeded exclusively. Above pH 7, the degradation was superseded by the ester hydrolysis to carbenicillin , beta-Lactams of both prodrugs are around three times more stable than carbenicillin disodium at pH 1, six times at PH 2, and 17 times at pH 3. The half-lives for carbenicillin production were predicted to be 17 hr for Carbenicillin phenyl sodium (CAS NO.21649-57-0) and 8.5 hr for carbenicillin phenyl sodium at pH 7.0 and 37 degrees.