1.0 2010-04-08 22:06:19 UTC 2025-11-18 22:56:51 UTC FDB004596 Undeca-trans-2-en-1-al 2-undecenal, also known as (E)-undec-2-enal or fema 3423, is a member of the class of compounds known as medium-chain aldehydes. Medium-chain aldehydes are an aldehyde with a chain length containing between 6 and 12 carbon atoms. Thus, 2-undecenal is considered to be a fatty aldehyde lipid molecule. 2-undecenal is practically insoluble (in water) and an extremely weak basic (essentially neutral) compound (based on its pKa). 2-undecenal can be found in fruits, which makes 2-undecenal a potential biomarker for the consumption of this food product. C11H20O 168.2759 168.151415262 (2E)-undec-2-enal (2E)-undec-2-enal 53448-07-0 CCCCCCCC\C=C\C=O InChI=1S/C11H20O/c1-2-3-4-5-6-7-8-9-10-11-12/h9-11H,2-8H2,1H3/b10-9+ PANBRUWVURLWGY-MDZDMXLPSA-N belongs to the class of organic compounds known as medium-chain aldehydes. These are an aldehyde with a chain length containing between 6 and 12 carbon atoms. Medium-chain aldehydes Organic compounds Organic oxygen compounds Organooxygen compounds Carbonyl compounds Aliphatic acyclic compounds Enals Hydrocarbon derivatives Organic oxides Aliphatic acyclic compound Alpha,beta-unsaturated aldehyde Enal Hydrocarbon derivative Medium-chain aldehyde Organic oxide Fatty aldehydes logp 4.93 ALOGPS logs -4.48 ALOGPS solubility 5.62e-03 g/l ALOGPS logp 3.87 ChemAxon pka_strongest_basic -4.2 ChemAxon iupac (2E)-undec-2-enal ChemAxon average_mass 168.2759 ChemAxon mono_mass 168.151415262 ChemAxon smiles CCCCCCCC\C=C\C=O ChemAxon formula C11H20O ChemAxon inchi InChI=1S/C11H20O/c1-2-3-4-5-6-7-8-9-10-11-12/h9-11H,2-8H2,1H3/b10-9+ ChemAxon inchikey PANBRUWVURLWGY-MDZDMXLPSA-N ChemAxon polar_surface_area 17.07 ChemAxon refractivity 54.25 ChemAxon polarizability 22.16 ChemAxon rotatable_bond_count 8 ChemAxon acceptor_count 1 ChemAxon donor_count 0 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::MsIr 8839 Specdb::MsIr 8840 Specdb::CMs 12873 Specdb::CMs 149567 Specdb::MsMs 83289 Specdb::MsMs 83290 Specdb::MsMs 83291 Specdb::MsMs 144855 Specdb::MsMs 144856 Specdb::MsMs 144857 Specdb::MsMs 2682990 Specdb::MsMs 2682991 Specdb::MsMs 2682992 Specdb::MsMs 3022899 Specdb::MsMs 3022900 Specdb::MsMs 3022901 HMDB0040247 Black tea Type 1 Green tea Type 1 Herbal tea Type 1 Red tea Type 1 Tea Type 1 specific Camellia sinensis 4442 fat green soap