PbO occurs in two polymorphs: litharge having a tetragonal crystal structure, and massicot having an orthorhombic crystal structure. Osmium tetroxide is a rare and expensive toxic chemical used as a staining agent for biological samples examined under electron microscopes. ; DESCRIPTION: Tetrodotoxin is an extremely potent poison (toxin) found mainly in the liver and sex organs (gonads) of some fish, such as puffer fish, globefish, and toadfish (order Tetraodontiformes) and in some amphibian, octopus, and shellfish species.Human poisonings occur when the flesh and/or … This is the form generally found in old paint, soil, dust, and various consumer products. The toxic effects results from fixation of lead in certain tissues such as the brain and peripheral nervous system. Modern applications for PbO are mostly in lead-based industrial glass and industrial ceramics, including computer components. APPEARANCE: Colorless crystalline solid that darkens when heated above 428°F (220°C). It is an amphoteric oxide. Lead arsenate is an insecticide, lead sulphate is used in rubber compounding, lead acetate has important uses in the chemical industry, lead naphthenate is an extensively used dryer and tetraethyllead is an antiknock additive for gasoline, where still permitted by law. Lead(II) oxide, also called lead monoxide, is the inorganic compound with the molecular formula PbO. Nitrogen Dioxide Section 8. The primary effect of lead is to cause spasm of the capillaries and arterioles. STEL: 9.4 mg/m³ 15 minutes.

Exposure controls/personal protection nitrogen dioxide ACGIH TLV (United States, 6/2013). LEAD Lead is one of the first metal known to man, the references of which … In rats, after lead compounds were applied for 12 days, total lead amount in urine significantly increased to 146.0 + or - 6.4 ng (SD) for lead stearate, 123.1 + or - 7.2 ng for lead sulfate, 115.9 + or - 5.3 ng for lead oxide, 47.8 + or - 6.9 ng for lead powder, and 10.3 ng …
a) Exposure to lead in the general population occurs from inhalation of contaminated air and dust of various types or ingestion of food and water containing lead with a fairly even split between ingestion and inhalation exposure routes.About 5-15% of ingested lead is absorbed by adults with less than 5% retained. Inorganic lead: Most inorganic forms of lead are white lead (a carbonate compound), yellow lead (Lead chromate, lead monoxide), or red lead (lead tetroxide). Lead alloys.