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.
In some cases, a chemical may present a single hazard. In other cases, several hazards may be associated with exposure to a chemical. Hazards can range from mild to severe. For example, an identified health hazard for acetic acid, as normally used in industry, is irritation and corrosion (sensory and respiratory). In contrast, exposure to lead may involve a multitude of health hazards, including neurotoxicity, blood effects, cardiovascular and kidney damage, and birth defects.