The chemical PbSO3 is lead(II) sulfite, which can also be called plumbous sulfite. Lead(II) sulfite is composed of one atom of lead, one atom of sulfur and three atoms of oxygen. The elemental symbols in the compound are Pb for lead, S for sulfur and O for oxygen.
Lead(II) sulfite has a molar mass of 287.26 grams per mole. It is an inorganic metal compound that has the appearance of a white powder. It is a nephrotoxin, neurotoxin and reproductive toxin that is most likely a carcinogen. It is associated with lead poisoning in humans if it is inhaled or ingested.