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.
SOME INSOLUBLE LEAD(II) COMPOUNDS. This page looks at the formation of some insoluble lead(II) compounds from aqueous lead(II) ions using precipitation reactions. It describes the reactions to form lead(II) hydroxide, lead(II) chloride, lead(II) iodide and lead(II) sulphate. Because of the insolubility of so many lead(II) compounds, the usual source of lead(II) ions in solution is lead(II) nitrate solution - and that will be assumed in all the following examples.