| Abkürzung | Bedeutung | Kategorie |
| P | Poggendorff's Annalen der Physik und Chemie | Periodika |
| p | Konzentration einer optisch aktiven Verbindung in g/100 g Lösung | Andere |
| p- | para | Andere |
| p. | Pagina | Andere |
| p. a. | pro anno | Andere |
| P. C. H. | Pharmazeutische Zentralhalle | Periodika |
| P. Ch. S | Proceedings of the Chemical Society | Periodika |
| p., pp. | page, pages | Andere |
| p.o. | peroral, per os | Andere |
| PAe. | Petroläther, Benzin, Ligroin | Substanz |
| Patty | G.D. Clayton, F.E. Clayton (eds.) : Patty’s Industsrial Hygiene and Toxicology, 3rd ed, Wiley Interscience, New York | Periodika |
| PB report | Publication Board Report (U.S. Department of Commerce, Scientific and Industrial Reports) | Periodika |
| PCT | Patent Cooperation Treaty | Andere |
| PEL | permitted exposure limit | Andere |
| Ph | phenyl substituent | Substanz |
| Ph. Ch | Zeitschrift für physikalische Chemie | Periodika |
| Ph.Eur. | European Pharmacopoeia, 2nd ed., Council of Europe, Strasbourg 1981 | Periodika |
| phr | part per hundred rubber (resin) | Andere |
| PL | Poland | Andere |
| PNS | peripheral nervous system | Andere |
| polym. | polymerisiert (sich), polymer | Andere |
| pos. | positiv | Andere |
| ppb | parts per billion | Andere |
| ppm | parts per million | Andere |
| ppt | parts per trillion | Andere |
| Präp. | Präparat | Andere |
| prim. | primär | Andere |
| Prod. | Produkt | Andere |
| PT | Portugal | Andere |
| PTA | Patent Term Adjustment (USA) | Andere |
| Py. | Pyridin | Substanz |
