Piperidine

[110-89-4] C5H11N (MW 85.17) InChI = 1S/C5H11N/c1-2-4-6-5-3-1/h6H,1-5H2 InChIKey = NQRYJNQNLNOLGT-UHFFFAOYSA-N (secondary amine base;1 condensation catalyst for aldol,4 Knoevenagel,3 and Michael condensations;20 thiophile for mediation of sulfoxide–sulfenate rearrangement;13 reagent for enamine formation and utilization22) Physical Data: mp −9 °C; bp 106 °C; d 0.862 g cm−3; secondary amine base of pKa 11.12. Solubility: miscible with water; sol common organic solvents (alcohol, benzene, chloroform). Form Supplied in: liquid (99%). Drying: by treatment with standard drying agents, e.g. CaH2, BaO, sodium metal, P2O5, or KOH. Purification: distillation may be carried out directly from CaH2, P2O5, or sodium.2 Handling, Storage, and Precautions: toxic either by absorption through the skin or by breathing. It is highly flammable, with a flash point of 16 °C. Use in a fume hood.