1.0 2016-05-19 04:38:07 UTC 2026-04-17 18:58:53 UTC Hafnium SmallMolecule Hafnium (Hf) is a chemical element with an average molecular weight of 178.49 g/mol. Hafnium belongs to the homogeneous transition metal compounds, a class of homogeneous metal compounds within the inorganic compounds. In industrial settings, it serves as a catalyst (PMC9159102) and a reagent (PMC10927795), while it is identified as a greenhouse gas in environmental contexts (PMC10134488). The element is found in or released from 34 recorded sources. These include electrical and electronic equipment such as antennas, amplifiers, adjustable resistors, coils, and auxiliary devices. It is also present in household cleaning and consumer products, including bleaching agents, pipe accessories, cigar cigarettes, and other smoking requisites. Other sources include household items like key rings, building and construction materials such as fencing, tents or canopies and ceilings, as well as food processing applications specifically related to fermentation processes for beer. Regarding plastics, hafnium has not been detected in polyethylene terephthalate or polystyrene. Literature supports inhalation as a route of exposure (PMC4131935). In terms of health effects, hafnium is associated with pulmonary edema (PMC2761044). Hf 178.49 179.94654876 hafnium hafnium 7440-58-6 [Hf] InChI=1S/Hf VBJZVLUMGGDVMO-UHFFFAOYSA-N Inorganic compounds Homogeneous metal compounds Homogeneous transition metal compounds Homogeneous transition metal compounds Homogeneous transition metal titanium group element atom Detected and Not Quantified logp 0 ChemAxon iupac hafnium ChemAxon average_mass 178.49 ChemAxon mono_mass 179.94654876 ChemAxon smiles [Hf] ChemAxon formula Hf ChemAxon inchi InChI=1S/Hf ChemAxon inchikey VBJZVLUMGGDVMO-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 #<HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f3831120640> 23986