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. 2016 Jan 28;57(2):283–290. doi: 10.3349/ymj.2016.57.2.283

Table 2. Molecular Weights of Representative Antibiotics.

Antibiotic Molecular weight (g/mol) Reference
Amoxicillin 365.4 Bryskier14
Ampicillin 349.4 Bryskier14
Cefaclor 367.8 Bryskier14
Cefalexin 347.4 Bryskier14
Cephalosporin C 415.4 Bryskier14
Chloramphenicol 323.10 Bryskier14
Ciclacillin 341.4 Bryskier14
Ciprofloxacin 331.3 Bryskier14
Erythromycin 733.9 Bryskier14
Fosfomycin 138.1 Bryskier14
Gentamicin 477.6 Bryskier14
Imipenem 299.3 Bryskier14
Kanamycin 484.5 Bryskier14
Minocycline 457.5 Bryskier14
Penicillin G 334.4 Bryskier14
Spectinomycin 332.4 Bryskier14
Streptomycin 581.6 Bryskier14
Tetracycline 444.4 Bryskier14