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Names | |||
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IUPAC name
Piperidine
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Preferred IUPAC name
Piperidine[2] | |||
Other names
Hexahydropyridine
Azacyclohexane Pentamethyleneamine Azinane | |||
Identifiers | |||
3D model (JSmol)
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ChEBI | |||
ChEMBL | |||
ChemSpider | |||
ECHA InfoCard | 100.003.467 | ||
EC Number |
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KEGG | |||
PubChem CID
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RTECS number |
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UNII | |||
UN number | 2401 | ||
CompTox Dashboard (EPA)
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Properties | |||
C5H11N | |||
Molar mass | 85.150 g·mol−1 | ||
Appearance | Colorless liquid | ||
Odor | Semen-like,[3] fishy-ammoniacal, pungent | ||
Density | 0.862 g/mL | ||
Melting point | −7 °C (19 °F; 266 K) | ||
Boiling point | 106 °C (223 °F; 379 K) | ||
Miscible | |||
Acidity (pKa) | 11.22 (protonated)[4] | ||
-64.2·10−6 cm3/mol | |||
Viscosity | 1.573 cP at 25 °C | ||
Hazards | |||
GHS labelling: | |||
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Danger | |||
H225, H311, H314, H331 | |||
P210, P233, P240, P241, P242, P243, P260, P261, P264, P271, P280, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P311, P312, P321, P322, P361, P363, P370+P378, P403+P233, P403+P235, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Safety data sheet (SDS) | MSDS1 | ||
Legal status | |||
Related compounds | |||
Related compounds
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Pyridine Pyrrolidine Piperazine Phosphorinane Arsinane | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene bridges (–CH2–) and one amine bridge (–NH–). It is a colorless liquid with an odor described as objectionable, typical of amines.[6] The name comes from the genus name Piper, which is the Latin word for pepper.[7] Although piperidine is a common organic compound, it is best known as a representative structure element within many pharmaceuticals and alkaloids, such as natural-occurring solenopsins.[8]
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: CS1 maint: DOI inactive as of June 2024 (link)