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 iodide is toxic due to its lead content. In the nineteenth century it was used as an artists' pigment under the name Iodine Yellow, but it was too unstable to be useful.ead iodide is toxic due to its lead content. In the nineteenth century it was used as an artists' pigment under the name Iodine Yellow, but it was too unstable to be useful.