1.0 2015-02-28 11:58:42 UTC 2025-11-19 03:00:14 UTC FDB030066 Osmium Osmium, also known as 76os or osmio, is a member of the class of compounds known as homogeneous transition metal compounds. Homogeneous transition metal compounds are inorganic compounds containing only metal atoms,with the largest atom being a transition metal atom. Osmium can be found in a number of food items such as garlic, dill, sunburst squash (pattypan squash), and green zucchini, which makes osmium a potential biomarker for the consumption of these food products. Osmium (from Greek ὀσμή osme, "smell") is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Its alloys with platinum, iridium, and other platinum-group metals are employed in fountain pen nib tipping, electrical contacts, and other applications where extreme durability and hardness are needed . Os 190.23 191.96148 osmium osmium 7440-04-2 [Os] InChI=1S/Os SYQBFIAQOQZEGI-UHFFFAOYSA-N belongs to the class of inorganic compounds known as homogeneous transition metal compounds. These are inorganic compounds containing only metal atoms,with the largest atom being a transition metal atom. Homogeneous transition metal compounds Inorganic compounds Homogeneous metal compounds Homogeneous transition metal compounds Homogeneous transition metal iron group element atom platinum group metal atom logp 0 ChemAxon iupac osmium ChemAxon average_mass 190.23 ChemAxon mono_mass 191.96148 ChemAxon smiles [Os] ChemAxon formula Os ChemAxon inchi InChI=1S/Os ChemAxon inchikey SYQBFIAQOQZEGI-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 Broccoli Type 1 specific Brassica oleracea var. italica 36774 0.0007 0.0009 0.0005 mg/100 g Carrot Type 1 specific Daucus carota ssp. sativus 79200 0.0002 0.0002 0.0002 mg/100 g Cucumber Type 1 specific Cucumis sativus 3659 0.00072 0.001499495 0.0003 mg/100 g Dill Type 1 specific Anethum graveolens 40922 0.0004 0.0005 0.0003 mg/100 g Eggplant Type 1 specific Solanum melongena 4111 0.00025 0.0003 0.0002 mg/100 g Garden onion Type 1 specific Allium cepa 4679 0.00125 0.00182524 0.00067421 mg/100 g Garden tomato Type 1 specific Solanum lycopersicum 4081 0.0003 0.0003 0.0003 mg/100 g Garlic Type 1 specific Allium sativum 4682 0.00065 0.0007 0.0006 mg/100 g Green bell pepper Type 1 specific Capsicum annuum 4072 0.0003 0.0003 0.0003 mg/100 g Green zucchini Type 1 specific Cucurbita pepo var. cylindrica 0.000161 0.000169216 0.000153384 mg/100 g Italian sweet red pepper Type 1 specific Capsicum annuum 4072 0.0003 0.0004 0.0002 mg/100 g Japanese pumpkin Type 1 specific Cucurbita maxima 3661 0.00035 0.0004 0.0003 mg/100 g Orange bell pepper Type 1 specific Capsicum annuum 4072 0.000197 0.000197899 0.000195726 mg/100 g Parsnip Type 1 specific Pastinaca sativa 4041 0.000191 0.000192564 0.000189406 mg/100 g Potato Type 1 specific Solanum tuberosum 4113 0.0003 0.0003 0.0003 mg/100 g Red beetroot Type 1 specific Beta vulgaris var. rubra 0.0003 0.0003 0.0003 mg/100 g Red bell pepper Type 1 specific Capsicum annuum 4072 0.000248 0.000263864 0.000232101 mg/100 g Romaine lettuce Type 1 specific Lactuca sativa L. var. longifolia 0.000974 0.001698205 0.0001 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 0.000724 0.001532605 0.0002 mg/100 g Turnip Type 1 specific Brassica rapa var. rapa 51350 0.0006 0.0008 0.0004 mg/100 g White cabbage Type 1 specific Brassica oleracea L. var. capitata L. f. alba DC. 0.00035 0.0004 0.0003 mg/100 g Yellow bell pepper Type 1 specific Capsicum annuum 4072 0.000289 0.000327916 0.000250369 mg/100 g Yellow zucchini Type 1 specific Cucurbita pepo var. cylindrica 0.00035 0.0004 0.0003 mg/100 g