Chemistry:Perfluorohexanoic acid
From HandWiki
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| Names | |
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| IUPAC name
2,2,3,3,4,4,5,5,6,6,6-undecafluorohexanoic acid
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| Other names
methyl undecafluorohexanoate
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| Identifiers | |
3D model (JSmol)
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| Abbreviations | PFHxA |
| ChEBI | |
| EC Number |
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PubChem CID
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| Properties | |
| C6HF11O2 | |
| Molar mass | 314.054 g·mol−1 |
| Appearance | Colorless liquid |
| Density | 1.757 g/cm3[1] |
| Boiling point | 157 °C (314.6 °C; 430 K)[2] |
| log P | 3.48 [2] |
| Vapor pressure | 1.98 mm Hg [2] |
Atmospheric OH rate constant
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5.2 10−13 cu cm/molec sec [2] |
| Acidity (pKa) | -0.16 [2] |
| Hazards | |
| Safety data sheet | [1] |
| GHS pictograms | 
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| GHS Signal word | Danger |
| H314 | |
| P264, P280, P301+330+331, P303+361+353, P304+340+310, P305+351+338+310, P363, P405, P501 | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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140 mg/L (B. calyciflorus over 24hrs) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Perfluorohexanoic acid (PFHxA) is a fluorinated carboxylic acid derivative of hexanoic acid. Fluorinated polymers with six carbon or less commonly degrade into perfluorohexanoic acid.[3]
Perfluorohexanoic acid has been found to rapidly bioaccumulate.[3]
In 2020 Michigan adopted drinking water standards for 5 previously unregulated PFAS compounds including PFHxA which has a maximum contaminant level (MCL) of 400 parts per billion (ppb).[4][5]
References
- ↑ 1.0 1.1 "SAFETY DATA SHEET Perfluorohexanoic acid". August 3, 2021. https://www.sigmaaldrich.com/US/en/sds/sial/43809.
- ↑ 2.0 2.1 2.2 2.3 2.4 PubChem. "Perfluorohexanoic acid" (in en). https://pubchem.ncbi.nlm.nih.gov/compound/67542.
- ↑ 3.0 3.1 Zahid, Muhammad; Heredia-Guerrero, Jose A.; Athanassiou, Athanassia; Bayer, Ilker S. (July 2017). "Robust water repellent treatment for woven cotton fabrics with eco-friendly polymers" (in en). Chemical Engineering Journal 319: 321–332. doi:10.1016/j.cej.2017.03.006. https://linkinghub.elsevier.com/retrieve/pii/S1385894717303431.
- ↑ Matheny, Keith (3 August 2020). "Michigan's drinking water standards for these chemicals now among toughest in nation". https://www.freep.com/story/news/local/michigan/2020/08/03/tougher-pfas-standards-drinking-water-michigan/5574268002/.
- ↑ "New state drinking water standards pave way for expansion of Michigan's PFAS clean-up efforts". 3 August 2020. https://www.michigan.gov/egle/0,9429,7-135--535602--,00.html.
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