[Derivatographic analysis of 6-beta-[(hexahydro-1H-azepin-1-yl) methylenamino]penicillanic acid].

Derivatographic analysis of 5 samples of 6-beta-(hexahydro-IH-azepin-I-yl)methylenamino penicillanic acid was performed. In addition to the antibiotic the samples had water and acetone in their composition. No effects associated with changes in the physical and chemical state of the substance were observed on the derivatogramme of the samples containing 0.