Perfluorooctanesulfonic acid

Perfluorooctanesulfonic acid

Chembox new
Name = Perfluorooctanesulfonic acid
ImageFile = Perfluorooctanesulfonic acid.png ImageName =
OtherNames =
Section1 = Chembox Identifiers
CASNo = 1763-23-1
SMILES = OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F

Section2 = Chembox Properties
Formula = C8HF17O3S
MolarMass = 500.13 g/mol
Density =
Solvent =
SolubleOther =
MeltingPt =
BoilingPt = 133 °C at 6 Torr

Section3 = Chembox Hazards
EUClass = Corrosive (C)
RPhrases = R34

Perfluorooctanesulfonic acid is an organofluorine compound. Salts of this compound are often used as surfactants. Like other fluorocarbons the C8F17 subunit in this compound repels water, and the sulfonic acid group makes the anion polar.

Uses

Perfluorooctanesulfonic acid is usually used as the sodium or potassium salts, referred to as perfluorooctanesulfonates (PFOS).

*PFOS was a key ingredient in Scotchgard, a fabric protector made by 3M, and numerous stain repellents. In 2000, 3M decided to reformulate Scotchgard, an effort which was finished in 2002.
*PFOS, together with PFOA, has also been used to make "aqueous film forming foam" (AFFF), a component of fire-fighting foams, and alcohol-type concentrate foams.
*PFOS compounds can be also found in some impregnation agents for textiles, paper, and leather; in wax, polishes, paints, varnishes, and cleaning products for general use; in metal surfaces, and carpets.
*In the semiconductor industry, PFOS is used in multiple photolithographic chemicals including: photoacid generators (PAGs) and anti-reflective coatings (ARCs). Phased out in the European Union semiconductor industry due to health concerns.

afety

Perfluorooctanesulfonates are persistent organic pollutants. It is exceptionally stable in the environment. In 1997, low levels of PFOS were found in tissues of polar bears, dolphins, albatrosses, and blood samples from people worldwide. PFOS is considered toxic through experiments done on rats. [cite journal | author = C. Lau, J. R. Thibodeaux, R. G. Hanson, J. M. Rogers, B. E. Grey, M. E. Stanton, J. L. Butenhoff and L. A. Stevenson | title = Exposure to Perfluorooctane Sulfonate during Pregnancy in Rat and Mouse. II: Postnatal Evaluation | year = 2003 | journal = Toxicol. Sci. | volume = 74 | issue = 2 | pages = 382–392 | doi = 10.1093/toxsci/kfg122 | pmid = 12773772]

PFOS was detected in the bodies of almost all people tested for it in a study by the U.S. government. Studies have found that animals exposed to PFOS in levels comparable to those commonly seen in humans have altered immune function.cite journal |author=Betts KS |title=Not immune to PFOS effects? |journal=Environ. Health Perspect. |volume=116 |issue=7 |pages=A290 |year=2008 |month=July |pmid=18629339 |pmc=2453185 |doi= |url=] [Peden-Adams MM, Keller JM, Eudaly JG, Berger J, Gilkeson GS, Keil DE: "Suppression of humoral immunity in mice following exposure to perfluorooctane sulfonate". Toxicol Sci. 2008 Jul;104(1):144-54. Epub 2008 Mar 20. PMID 18359764]

ee also

* Perfluorooctanoic acid

References

*

External links

* [http://www.defra.gov.uk/environment/chemicals/pdf/pfos-riskstrategy.pdf PFOS risk assessment report]
*
* [http://www.oecd.org/document/58/0,3343,en_2649_34375_2384378_1_1_1_1,00&&en-USS_01DBC.html OECD Hazard Assessment]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • perfluorooctanesulfonic acid — noun A synthetic fluorosurfactant and global pollutant. Syn: perfluorooctane sulfonate …   Wiktionary

  • Perfluorooctanoic acid — IUPAC name pentadecafluorooctanoic acid …   Wikipedia

  • Sulfonic acid — General structure of sulfonic acid. R can also be equal to H. Sulfonic acid (or sulphonic acid) usually refers to a member of the class of organosulfur compounds with the general formula RS(=O)2–OH, where R is an alkyl or aryl.[1] The formal part …   Wikipedia

  • perfluorobutanesulfonic acid — noun A chemical compound with a four carbon fluorocarbon chain and a sulfonic acid functional group, used as a replacement for the persistent, toxic, and bioaccumulative perfluorooctanesulfonic acid …   Wiktionary

  • Perfluorocarbon — derivatives are perfluorocarbons with some functional group attached, for example perfluorooctanesulfonic acid. Perfluorocarbon derivatives can be very different from perfluorocarbons in their properties, applications and toxicity.The term… …   Wikipedia

  • Sulfur — This article is about the chemical element. For other uses, see Sulfur (disambiguation). phosphorus ← sulfur → chlorine …   Wikipedia

  • Organofluorine chemistry — Some important organofluorine compounds. A: fluoromethane B: isoflurane C: a CFC D: an HFC E: triflic acid F: Teflon G: PFOS H: fluorouracil I: fluoxetine Organofluorine chemistry describes the ch …   Wikipedia

  • Fluorocarbon — Perfluorohexane, a stable fluoroalkane liquid Fluorocarbons, sometimes referred to as perfluorocarbons or PFCs, are organofluorine compounds that contain only carbon and fluorine bonded together in strong carbon–fluorine bonds. Fluoroalkanes that …   Wikipedia

  • Organosulfur compounds — are organic compounds that contain sulfur. They are often associated with foul odours, but many of the sweetest compounds known are organosulfur derivatives. Nature abounds with organosulfur compounds sulfur is essential for life. Two of the 20… …   Wikipedia

  • Fire fighting foam — Firefighters sprayed foam on structures in the Mammoth Hot Springs complex on September 10, 1988 during the Yellowstone Fires. Fire fighting foam is a foam used for fire suppression. Its role is to cool the fire and to coat the fuel, preventing… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”