1 paroxysmal Pertaining to or marked by paroxysm; caused by paroxysms or convulsions of nature. 2  paroxysmal Specifically In geology: Relating to or produced by a violent convulsion of nature.
Inorganic lead compounds are Group 2A - Probably carcinogenic to humans. American Conference for Governmental Industrial Hygienists (ACGIH): A3 - Confirmed animal carcinogen. Teratogenicity / Embryotoxicity: DEVELOPMENTAL HAZARD. May harm the unborn child. Known to cause: learning disabilities, effects on behaviour.
Lead (II) sulfate is also partially soluble in diluted hydrogen chloride and nitric acid. It is soluble in sodium hydroxide and ammonium acetate. Lead (II) sulfate, like all lead compounds, is toxic to humans. It is readily absorbed by the skin and can cause injury to the central nervous system and birth defects. Ingesting large quantities of lead (II) sulfate can cause seizures, coma and even death.