Catalpic acid is a conjugated polyunsaturated fatty acid. The melting point of this fatty acid is 32 °C. Catalpic acid occurs naturally in the seeds of yellow catalpa (Catalpa ovata) and southern catalpa (Catalpa bignonioides). Seeds of Catalpa species contain about 40% catalpic acid.^[1]

Quick Facts Names, Identifiers ...

Catalpic acid

Names
Preferred IUPAC name (9E,11E,13Z)-Octadeca-9,11,13-trienoic acid
Identifiers
CAS Number	4337-71-7 Y
3D model (JSmol)	Interactive image
ChemSpider	4532629 Y
PubChem CID	5385589
UNII	27D2CW7K2P Y
InChI InChI=1S/C18H30O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h5-10H,2-4,11-17H2,1H3,(H,19,20)/b6-5-,8-7+,10-9+ Y Key: CUXYLFPMQMFGPL-WJTNUVGISA-N Y InChI=1/C18H30O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h5-10H,2-4,11-17H2,1H3,(H,19,20)/b6-5-,8-7+,10-9+ Key: CUXYLFPMQMFGPL-WJTNUVGIBJ
SMILES O=C(O)CCCCCCC\C=C\C=C\C=C/CCCC
Properties
Chemical formula	C18H30O2
Molar mass	278.44 g/mol
Melting point	32 °C (90 °F; 305 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

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