PFOS and PFOA
were historically used to fight and train for flammable liquid fires but can no longer be imported or manufactured here.
2011) was used to measure: linear PFOS (n-PFOS), sum of perfluoromethylheptane sulfonic acid isomers (Sm-PFOS), sum of perfluorodimethylhexane sulfonic acid isomers (Sm2-PFOS); linear PFOA
), sum of perfluoromethylheptanoic and perfluorodimethylhexanoic acids (Sb-PFOA
); PFHxS, N-ethyl-perfluorooctane sulfonamido acetic acid (Et-PFOSA-AcOH; also known as EtFOSAA), N-methyl-perfluorooctane sulfonamido acetic acid (MePFOSA-AcOH; also known as MeFOSAA), and perfluorononanoic acid (PFNA).
Since manufacturers phased out production of PFOA
and PFOS, the levels in serum have been decreasing in the general population.
Representatives from the New York State Department of Environmental Conservation and companies Saint-Gobain and Honeywell presented new information on sites contaminated with the chemical PFOA
and other compounds.
The EPA earlier this year set permanent drinking water health advisories of 70 parts per trillion for PFOA
and PFOS, a substantial reduction in its PHA of 400 parts per trillion for PFOA
and 200 parts per trillion for PFOS.
DuPont settled in 2004 for more than $300 million, which included installing filtration plants, funding an independent study to determine whether PFOA
was linked to any diseases and medical monitoring if links were found.
EPA is working to eliminate PFOA
emissions, and many newer non-stick pans, such as the popular Teflon[R] brand, have switched to a chemical called Polytetrafluoroethylene (PTFE) to make their non-stick coating.
(Perfluorooctanoic acid) is a chemical substance that was used in the manufacture of PTFE (as well as hundreds of other manufacturing and industrial applications).
Boyd Coatings' Zero PFOA
PTFE coatings have been successful in the field now for nearly a year.
While there are no known cases of airborne PFOA
causing direct health problems for consumers, workers in plants where Teflon has been produced are at increased risk for cancers of the pancreas and the male reproductive tract.
Teflon and PFOA
are PFCs, a large group of chemicals that has now polluted the entire planet.
Fluoropolymer producer Solvay Solexis of Bollate, Italy, plans to produce a substitute for perfluorooctanoate ammonium, or PFOA
, a polymerization aid used in minute quantities for manufacturing fluoropolymers.