1.0 2010-04-08 22:05:56 UTC 2025-11-18 22:53:50 UTC FDB003768 Cesium Cesium, also known as cs or cesio, is a member of the class of compounds known as homogeneous alkali metal compounds. Homogeneous alkali metal compounds are inorganic compounds containing only metal atoms,with the largest atom being a alkali metal atom. Cesium can be found in a number of food items such as almond, white cabbage, dill, and cucumber, which makes cesium a potential biomarker for the consumption of these food products. Cesium can be found primarily in blood, cerebrospinal fluid (CSF), saliva, and urine. Cesium is a non-carcinogenic (not listed by IARC) potentially toxic compound. Caesium or cesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28.5 °C (83.3 °F), which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium has physical and chemical properties similar to those of rubidium and potassium. The most reactive of all metals, it is pyrophoric and reacts with water even at −116 °C (−177 °F). It is the least electronegative element, with a value of 0.79 on the Pauling scale. It has only one stable isotope, caesium-133. Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from waste produced by nuclear reactors . Caesium Cesio Cesium atomic spectroscopy standard concentrate 1.00 g Cs Cesium or caesium [UN1407] [Dangerous when wet] Cesium-133 Cesium, elemental Cesium, Isotope Of Mass 137 CS Zaesium Cs 132.9055 132.90544687 caesium caesium 7440-46-2 [Cs] InChI=1S/Cs TVFDJXOCXUVLDH-UHFFFAOYSA-N belongs to the class of inorganic compounds known as homogeneous alkali metal compounds. These are inorganic compounds containing only metal atoms,with the largest atom being a alkali metal atom. Homogeneous alkali metal compounds Inorganic compounds Homogeneous metal compounds Homogeneous alkali metal compounds Homogeneous alkali metal alkali metal atom logp 0 ChemAxon iupac caesium ChemAxon average_mass 132.9055 ChemAxon mono_mass 132.90544687 ChemAxon smiles [Cs] ChemAxon formula Cs ChemAxon inchi InChI=1S/Cs ChemAxon inchikey TVFDJXOCXUVLDH-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 47868 Specdb::MsMs 47869 Specdb::MsMs 47870 Specdb::MsMs 168894 Specdb::MsMs 168895 Specdb::MsMs 168896 HMDB0013669 51559 Almond Type 1 specific Prunus dulcis 3755 0.01 0.01 0.01 mg/100 g Black walnut Type 1 specific Juglans nigra 16719 0.01 0.01 0.01 mg/100 g Black-eyed pea Type 1 specific Vigna unguiculata ssp. unguiculata 3920 Brazil nut Type 1 specific Bertholletia excelsa 3645 0.13 0.13 0.13 mg/100 g Broccoli Type 1 specific Brassica oleracea var. italica 36774 0.00145 0.0015 0.0014 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 0.01 0.01 0.01 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 0.001 0.001 0.001 mg/100 g Cow milk, pasteurized, vitamin A + D added, 0% fat Type 2 specific Cow milk, pasteurized, vitamin A + D added, 1% fat Type 2 specific Cow milk, pasteurized, vitamin A + D added, 2% fat Type 2 specific Cow milk, pasteurized, vitamin D added, 3.25% fat Type 2 specific Cucumber Type 1 specific Cucumis sativus 3659 0.000024 0.00003627 0.0 mg/100 g Dill Type 1 specific Anethum graveolens 40922 0.000065 0.00007 0.00006 mg/100 g Eggplant Type 1 specific Solanum melongena 4111 0.00003 0.00003 0.00003 mg/100 g Garden tomato Type 1 specific Solanum lycopersicum 4081 0.00004 0.00004 0.00004 mg/100 g Garlic Type 1 specific Allium sativum 4682 0.00006 0.00006 0.00006 mg/100 g Green bell pepper Type 1 specific Capsicum annuum 4072 0.0004 0.0004 0.0004 mg/100 g Green zucchini Type 1 specific Cucurbita pepo var. cylindrica 0.000072 0.00007469 0.00006943 mg/100 g Italian sweet red pepper Type 1 specific Capsicum annuum 4072 0.0001 0.0001 0.0001 mg/100 g Japanese pumpkin Type 1 specific Cucurbita maxima 3661 0.00005 0.00006 0.00004 mg/100 g Milk (Cow) Type 2 specific 0.011155 0.03 0.000752 uM Orange bell pepper Type 1 specific Capsicum annuum 4072 0.000057 0.00005708 0.00005666 mg/100 g Parsnip Type 1 specific Pastinaca sativa 4041 0.000505 0.000505785 0.000504284 mg/100 g Pistachio Type 1 specific Pistacia vera 55513 0.01 0.01 0.01 mg/100 g Potato Type 1 specific Solanum tuberosum 4113 0.00025 0.0003 0.0002 mg/100 g Red beetroot Type 1 specific Beta vulgaris var. rubra 0.000115 0.00012 0.00011 mg/100 g Red bell pepper Type 1 specific Capsicum annuum 4072 0.000031 0.00003587 0.00002643 mg/100 g Romaine lettuce Type 1 specific Lactuca sativa L. var. longifolia 0.000579 0.000627578 0.0005 mg/100 g Spinach Type 1 specific Spinacia oleracea 3562 0.0002 0.0002 0.0002 mg/100 g Sunburst squash (pattypan squash) Type 1 specific Cucurbita pepo var. clypeata 0.000088 0.0001 0.00007797 mg/100 g Turnip Type 1 specific Brassica rapa var. rapa 51350 0.00031 0.00032 0.0003 mg/100 g White cabbage Type 1 specific Brassica oleracea L. var. capitata L. f. alba DC. 0.000055 0.00006 0.00005 mg/100 g Yellow bell pepper Type 1 specific Capsicum annuum 4072 0.000046 0.00004634 0.00004489 mg/100 g Yellow zucchini Type 1 specific Cucurbita pepo var. cylindrica 0.00055 0.0006 0.0005 mg/100 g