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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 849Generated: October 26, 2026

Pipecolic Acid

PIPERIDINE-2-CARBOXYLIC ACID · PIPECOLINIC ACID · 2-PIPERIDINECARBOXYLIC ACID · DL-PIPECOLIC ACID · H-DL-Pip-OH · H-DL-HOPRO-OH · CAS:4043-87-2 · DL-HOMOPROLINE

https://huagongshe.com/en/chemical/849

Pipecolic Acid molecular structure

Identifiers & Physical Properties

CAS No.3105-95-1
Molecular formulaC6H11NO2
Average molar mass129.16 g/mol
Monoisotopic mass129.07897859 g/mol
SMILESO=C(O)C1CCCCN1
InChIKeyHXEACLLIILLPRG-UHFFFAOYSA-N
PubChem CID849
ChEMBLCHEMBL308408
ChEBICHEBI:17964
EC No.208-616-3
DTXSIDDTXSID40862144

Chemical & Physical Properties

XLogP-2.3
Topological polar surface area49.3
Hydrogen bond donors2
Hydrogen bond acceptors3
Rotatable bonds1
Heavy atoms9
Formal charge0
Complexity114
LogP (partition coefficient)-2.31
Solubility314 mg/mLMethanol (Slightly), Water (Slightly)
Melting point264 °C282 °C (dec.)(lit.)
Physical DescriptionSolid
Collision Cross Section128 Ų [M+H]+ [CCS Type: DTMethod: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]129.3 Ų [M-H]-
Boiling point239.22°C (rough estimate)
Density1.1426 (rough estimate)
Refractive index1.4300 (estimate)
Storage conditionsStore at RT.
Physical stateSolid
ColorWhite to Off-White
InChIInChI=1S/C6H11NO2/c8-6(9)5-3-1-2-4-7-5/h5,7H,1-4H2,(H,8,9)
InChIKeyHXEACLLIILLPRG-UHFFFAOYSA-N
SMILESC1(C(=O)O)NCCCC1
CAS DataBase Reference4043-87-2(CAS DataBase Reference)
FDA UNIIH254GW7PVV
NIST Chemistry ReferencePipecolic acid(4043-87-2)
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH319-H315
GHS precautionary statementsP264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362
Hazard symbolsXi
Risk statements (R)36/37/38
Safety statements (S)26-36
Water hazard class (WGK)3
Hazard NoteIrritant

Safety & Regulations

GHS classificationWarningH315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 48 reports by companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard Classes and CategoriesSkin Irrit. 2 (100%)
Water hazard class (WGK)3
Risk statements (R)36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
hazard_noteIrritant
Safety statements (S)26-36
GHS hazard statementsH319-H315
GHS precautionary statementsP264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362

Applications & Uses

Uses

Pipecolic acid is involved in synaptic transmission in the central nervous system.