1.0 2010-04-08 22:05:56 UTC 2025-11-18 22:53:51 UTC FDB003769 Europium Europium, also known as 63eu or europio, is a member of the class of compounds known as homogeneous lanthanide compounds. Homogeneous lanthanide compounds are inorganic compounds containing only metal atoms, with the largest atom being a lanthanide atom. Europium can be found in a number of food items such as carrot, black-eyed pea, black walnut, and red beetroot, which makes europium a potential biomarker for the consumption of these food products. Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3, but the oxidation state +2 is also common. All europium compounds with oxidation state +2 are slightly reducing. Europium has no significant biological role and is relatively non-toxic compared to other heavy metals. Most applications of europium exploit the phosphorescence of europium compounds. Europium is one of the least abundant elements in the universe; only about 5×10−8% of all matter in the universe is europium . Dieuropium trioxide EU Europia Europia (Eu2O3) Europium monoxide Europium oxide Europium oxide (Eu2O2) Europium Oxide (eu2o3) Europium oxide (euo) Europium oxide (EuO1.5) Europium sesquioxide Europium trioxide Europium(3+) oxide Europium(III) oxide Eu 151.964 152.921226219 europium europium 7440-53-1 [Eu] InChI=1S/Eu OGPBJKLSAFTDLK-UHFFFAOYSA-N belongs to the class of inorganic compounds known as homogeneous lanthanide compounds. These are inorganic compounds containing only metal atoms, with the largest atom being a lanthanide atom. Homogeneous lanthanide compounds Inorganic compounds Homogeneous metal compounds Homogeneous lanthanide compounds Homogeneous lanthanide f-block element atom lanthanoid atom logp 0 ChemAxon iupac europium ChemAxon average_mass 151.964 ChemAxon mono_mass 152.921226219 ChemAxon smiles [Eu] ChemAxon formula Eu ChemAxon inchi InChI=1S/Eu ChemAxon inchikey OGPBJKLSAFTDLK-UHFFFAOYSA-N ChemAxon polar_surface_area 0 ChemAxon refractivity 0 ChemAxon polarizability 1.78 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 0 ChemAxon donor_count 0 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 50094 Specdb::MsMs 50095 Specdb::MsMs 50096 Specdb::MsMs 112263 Specdb::MsMs 112264 Specdb::MsMs 112265 37266 Almond Type 1 specific Prunus dulcis 3755 0.01 0.01 0.01 mg/100 g Black walnut Type 1 specific Juglans nigra 16719 0.001 0.001 0.001 mg/100 g Black-eyed pea Type 1 specific Vigna unguiculata ssp. unguiculata 3920 Brazil nut Type 1 specific Bertholletia excelsa 3645 0.01 0.01 0.01 mg/100 g Broccoli Type 1 specific Brassica oleracea var. italica 36774 0.000045 0.00005 0.00004 mg/100 g Butternut Type 1 specific Juglans cinerea 91214 0.002 0.002 0.002 mg/100 g Carrot Type 1 specific Daucus carota ssp. sativus 79200 0.00005 0.00005 0.00005 mg/100 g Cashew nut Type 1 specific Anacardium occidentale 171929 0.002 0.002 0.002 mg/100 g Coconut Type 1 specific Cocos nucifera 13894 0.01 0.01 0.01 mg/100 g Common hazelnut Type 1 specific Corylus avellana 13451 0.003 0.003 0.003 mg/100 g Dill Type 1 specific Anethum graveolens 40922 0.0001 0.0001 0.0001 mg/100 g Pistachio Type 1 specific Pistacia vera 55513 0.01 0.01 0.01 mg/100 g Red beetroot Type 1 specific Beta vulgaris var. rubra 0.0002 0.0002 0.0002 mg/100 g Romaine lettuce Type 1 specific Lactuca sativa L. var. longifolia 0.0 0.0 0.0 mg/100 g Spinach Type 1 specific Spinacia oleracea 3562 0.00015 0.0002 0.0001 mg/100 g Turnip Type 1 specific Brassica rapa var. rapa 51350 0.00005 0.0001 0.0 mg/100 g