1.0 2010-04-08 22:05:23 UTC 2025-11-18 22:37:41 UTC FDB002470 C.I. Natural Red 20 Red dye component of alkanet root extract used for colouring sausage casings, margarine, confectionery and wine. This extract, formerly FEMA 2016, has been removed from the FEMA GRAS list. Not permitted in Germany. Japan approved. Alkanet extract Alkanet extract (van) Alkanna red Alkanna red (van) Alkannin Alkannin (van) Anchusa acid Anchusa acid (van) Anchusin Anchusin (van) C.I. 75530 C.I. Natural red 20 C.I. Natural Red 20 (VAN) C16H16O5 288.2952 288.099773622 5,8-dihydroxy-2-(1-hydroxy-4-methylpent-3-en-1-yl)-1,4-dihydronaphthalene-1,4-dione 5,8-dihydroxy-2-(1-hydroxy-4-methylpent-3-en-1-yl)naphthalene-1,4-dione 517-88-4 CC(C)=CCC(O)C1=CC(=O)C2=C(O)C=CC(O)=C2C1=O InChI=1S/C16H16O5/c1-8(2)3-4-10(17)9-7-13(20)14-11(18)5-6-12(19)15(14)16(9)21/h3,5-7,10,17-19H,4H2,1-2H3 NEZONWMXZKDMKF-UHFFFAOYSA-N belongs to the class of organic compounds known as naphthoquinones. Naphthoquinones are compounds containing a naphthohydroquinone moiety, which consists of a benzene ring linearly fused to a bezene-1,4-dione (quinone). Naphthoquinones Organic compounds Benzenoids Naphthalenes Naphthoquinones Aromatic homopolycyclic compounds 1-hydroxy-2-unsubstituted benzenoids Aromatic monoterpenoids Aryl ketones Bicyclic monoterpenoids Hydrocarbon derivatives Organic oxides Quinones Secondary alcohols Vinylogous acids 1-hydroxy-2-unsubstituted benzenoid Alcohol Aromatic homopolycyclic compound Aromatic monoterpenoid Aryl ketone Bicyclic monoterpenoid Hydrocarbon derivative Ketone Monoterpenoid Naphthoquinone Organic oxide Organic oxygen compound Organooxygen compound Quinone Secondary alcohol Vinylogous acid a quinone a secondary metabolite logp 2.19 ALOGPS logs -3.09 ALOGPS solubility 2.36e-01 g/l ALOGPS melting_point Mp 116-117° (149°) logp 3.01 ChemAxon pka_strongest_acidic 9.6 ChemAxon pka_strongest_basic -3.1 ChemAxon iupac 5,8-dihydroxy-2-(1-hydroxy-4-methylpent-3-en-1-yl)-1,4-dihydronaphthalene-1,4-dione ChemAxon average_mass 288.2952 ChemAxon mono_mass 288.099773622 ChemAxon smiles CC(C)=CCC(O)C1=CC(=O)C2=C(O)C=CC(O)=C2C1=O ChemAxon formula C16H16O5 ChemAxon inchi InChI=1S/C16H16O5/c1-8(2)3-4-10(17)9-7-13(20)14-11(18)5-6-12(19)15(14)16(9)21/h3,5-7,10,17-19H,4H2,1-2H3 ChemAxon inchikey NEZONWMXZKDMKF-UHFFFAOYSA-N ChemAxon polar_surface_area 94.83 ChemAxon refractivity 79.82 ChemAxon polarizability 29.8 ChemAxon rotatable_bond_count 3 ChemAxon acceptor_count 5 ChemAxon donor_count 3 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 76314 Specdb::MsMs 76315 Specdb::MsMs 76316 Specdb::MsMs 136119 Specdb::MsMs 136120 Specdb::MsMs 136121 Specdb::MsMs 2346941 Specdb::MsMs 2346942 Specdb::MsMs 2346943 Specdb::MsMs 2591716 Specdb::MsMs 2591717 Specdb::MsMs 2591718 Specdb::CMs 22785 Specdb::CMs 42009 Specdb::CMs 129179 Specdb::CMs 156185 Specdb::CMs 980444 Specdb::CMs 980445 Specdb::CMs 980446 Specdb::CMs 980447 Specdb::CMs 980448 Specdb::CMs 980449 Specdb::CMs 980450 Specdb::CMs 980451 Specdb::CMs 980452 Specdb::CMs 980453 Specdb::CMs 980454 Specdb::CMs 980455 Specdb::CMs 980456 HMDB30579 #<Reference:0x000055ce3250f388>