Propylene oxide is used in polyurethane foam production and food fumigation. Occupational exposure is generally less than 1 ppm. Atmospheric concentrations near production facilities are less than 10-1 ppmpm
Acrylamide is a white, odorless solid soluble in water and organic solvents. Produced industrially as precursor to polyacrylamides for thickening and flocculation. Forms in burnt foods above 120°C through Maillard reaction
PCBs were widely used in electronics and paper production until 1978. Monsanto Company produced PCBs under trade name Aroclor from 1930 to 1977. Global production reached approximately 1.2 million tons. Production was banned internationally in 2001
Nickel(II) sulfate is a turquoise salt with formula NiSO4(H2O)6. Approximately 40,000 tonnes produced in 2005. Seven different sulfate salts exist, varying in hydration and crystal habit. Anhydrous form decomposes to NiO above 640°C
Clear, colourless, non-flammable liquid with chloroform-like smell. First synthesized in 1836 by Auguste Laurent. Discovered by E. Fischer in 1864 via reduction of hexachloroethane. Commercial production began in Germany in 1920, US in 1925
Styrene is a colorless, oily liquid with formula C6H5CH=CH2. Named after storax balsam resin of Liquidambar trees. Evaporates easily with sweet smell