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piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum sulfide catalyst



















                                                                                                                  Chemicals  Piperidine
CAS number 110-89-4

Piperidine CAS number 110-89-4


Synonyms: hexahydropyridine, pentamethyleneimine, azacyclohexane, cyclopentimine, cypentil, hexazane,
Molecular formula: C5H11N
CAS No: 110-89-4
EINECS No: 203-813-0
Annex I Index No: 613-027-00-3

Piperidine Index No: 613-027-00-3 Physical data

Appearance: colourless liquid with the odour of pepper
Melting point: -11 C
Boiling point: 106 C
Vapour density: 3 (air = 1)
Vapour pressure: 40 mm Hg at 20 C
Density (g cm-3): 0.86
Flash point: 16 C (closed cup)
Explosion limits:
Autoignition temperature:
Water solubility: soluble


Stable. Highly flammable. Incompatible with strong oxidizing agents, strong acids, organic acids, water. Vapours may flow along surfaces to a distant source of ignition.


Poison. May be fatal if inhaled or swallowed. Severe irritant. Skin contact may cause severe irritation or burns. Contact with the eyes may lead to permanent damage.

Toxicity data

ORL-RAT LD50 400 mg kg-1
IPR-MUS LD50 50 mg kg-1
SKN-RBT LD50 320 mg kg-1
ORL-MUS LD50 30 mg kg-1
ORL-RBT LD50 145 mg kg-1

Risk phrases

R11 R23 R24 R34. (Note: The risk phrases here are those given by Annex I. Annex I does not specify R22 or R25, but this material is clearly harmful if swallowed so should be treated as though R22 were included.]

Personal protection

Safety glasses, gloves, good ventilation. Remove sources of ignition from the working area.

Piperidine is an organic compound with the molecular formula (CH2)5NH. This heterocyclic amine consists of a six-membered ring containing five methylene units and one nitrogen atom. It is a colorless fuming liquid with an odor described as ammoniacal, pepper-likethe name comes from the genus name Piper, which is the Latin word for pepper. Piperidine is a widely used building block and chemical reagent in the synthesis of organic compounds, including pharmaceuticals.

a colorless, liquid hydrocarbon, (CH)NH, found in many alkaloids and obtained by reducing pyridine or by treating piperine with alkali: used in making rubber, oils, fuels, etc.


Industrially, piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum sulfide catalyst


Industrially, piperidine is produced by the hydrogenation of pyridine, usually over a molybdenum sulfide catalyst

Piperidine is used as a solvent and as a base. The same is true for certain derivatives: N-formylpiperidine is a polar aprotic solvent with better hydrocarbon solubility than other amide solvents, and 2,2,6,6-tetramethylpiperidine is highly sterically hindered base, useful because of its low nucleophilicity and high solubility in organic solvents.


Note /Government Notification: These chemicals are designated as those that are used in the manufacture of the controlled substances and are important to the manufacture of the substances. For any (Control Substance) products Import and Export *** subjected to your country government laws /control substance ACT.
Information: The information on this web page is provided to help you to work safely, but it is intended to be an overview of hazards, not a replacement for a full Material Safety Data Sheet (MSDS). MSDS forms can be downloaded from the web sites of many chemical suppliers. ,also that the information on the PTCL Safety web site, where this page was hosted, has been copied onto many other sites, often without permission. If you have any doubts about the veracity of the information that you are viewing, or have any queries, please check the URL that your web browser displays for this page. If the URL begins " Benzoate.htm/" the page is maintained by the Safety Officer in Physical Chemistry at Oxford University. If not, this page is a copy made by some other person and we have no responsibility for it.
The Controlled Substances Act (CSA) was enacted into law by the Congress of the United States as Title II of the Comprehensive Drug Abuse Prevention and Control Act of 1970.[1] The CSA is the federal U.S. drug policy under which the manufacture, importation, possession, use and distribution of certain substances is regulated. The Act also served as the national implementing legislation for the Single Convention on Narcotic Drugs

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