Product Name

  • Name

    DL-Pipecolinic acid

  • EINECS 208-616-3
  • CAS No. 535-75-1
  • Density 1.125 g/cm3
  • Solubility Soluble in water
  • Melting Point 282 °C (dec.)(lit.)
  • Formula C6H11NO2
  • Boiling Point 265.8 °C at 760 mmHg
  • Molecular Weight 129.159
  • Flash Point 114.5 °C
  • Transport Information
  • Appearance white to light beige fine crystalline powder
  • Safety 26-36-24/25
  • Risk Codes 36/37/38;
  • Molecular Structure Molecular Structure of 535-75-1 (DL-Pipecolinic acid)
  • Hazard Symbols IrritantXi
  • Synonyms Pipecolicacid (8CI);(RS)-2-Piperidinecarboxylic acid;2-Carboxypiperidine;2-Pipecolinic acid;2-Piperidinylcarboxylic acid;DL-2-Piperidinecarboxylicacid;Dihydrobaikiane;Hexahydro-2-picolinic acid;Homoproline;NSC 17125;a-Pipecolinic acid;
  • PSA 49.33000
  • LogP 0.54190

DL-Pipecolinic acid Chemical Properties


IUPAC Name: Piperidine-2-carboxylic acid
Canonical SMILES: C1CCNC(C1)C(=O)O
InChI: InChI=1S/C6H11NO2/c8-6(9)5-3-1-2-4-7-5/h5,7H,1-4H2,(H,8,9)
InChIKey: HXEACLLIILLPRG-UHFFFAOYSA-N
Molecular Weight: 129.15704 [g/mol]
Molecular Formula: C6H11NO2
XLogP3: -2.3
H-Bond Donor: 2
H-Bond Acceptor: 3 
EINECS: 208-616-3
Product Categories: Amino Acids and Derivatives; Piperidine 
Water Solubility: soluble
Appearance: white to light beige fine crystalline powder
Melting Point: 282 °C (dec.)(lit.)
Index of Refraction: 1.478
Molar Refractivity: 32.51 cm3
Molar Volume: 114.7 cm3
Surface Tension: 40.3 dyne/cm
Density: 1.125 g/cm3
Flash Point: 114.5 °C
Enthalpy of Vaporization: 55.45 kJ/mol
Boiling Point: 265.8 °C at 760 mmHg
Vapour Pressure: 0.0026 mmHg at 25 °C
Classification Code of DL-Pipecolinic acid (CAS NO.535-75-1): Mutation data 

DL-Pipecolinic acid Uses

 DL-Pipecolinic acid (CAS NO.535-75-1) is used as chemical reagent, organic intermediates, fine chemicals, pharmaceutical research and development.

DL-Pipecolinic acid Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 610mg/kg (610mg/kg)   Clinical and Experimental Pharmacology and Physiology. Vol. 21, Pg. 997, 1994.
mouse LD50 intravenous 2200mg/kg (2200mg/kg)   Therapie. Vol. 23, Pg. 1343, 1968.

DL-Pipecolinic acid Consensus Reports

Reported in EPA TSCA Inventory.

DL-Pipecolinic acid Safety Profile

Moderately toxic by intravenous route. When heated to decomposition it emits toxic vapors of NOx.
Safety information of DL-Pipecolinic acid (CAS NO.535-75-1):
Hazard Codes:  IrritantXi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-24/25
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S24/25:Avoid contact with skin and eyes.
WGK Germany: 3
RTECS: TK6021000
TSCA: T

DL-Pipecolinic acid Specification

  DL-Pipecolinic acid (CAS NO.535-75-1), its Synonyms are 2-Piperidinecarboxylic acid ; Acide pipecolique ; Acide piperidine-carboxylique-2 ; Dihydrobaikiane ; Hexahydropicolinic acid ; Homoproline ; Pipecolate ; Pipecolic acid ; Pipecolinic acid ; Piperolinic acid .

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