Perfluorobutanesulfonic acid

Perfluorobutanesulfonic acid
Names
	Preferred IUPAC name 1,1,2,2,3,3,4,4,4-Nonafluorobutane-1-sulfonic acid
	Other names FC-98; Nonaflate; Nonafluorobutanesulphonic acid; Perfluorobutane sulfonate; PFBS
Identifiers
CAS Number	375-73-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:132446 ;
ChemSpider	61132 ;
ECHA InfoCard	100.006.176
EC Number	206-793-1;
PubChem CID	67815;
RTECS number	EK5930000;
UNII	1FV02N6NVO ;
UN number	3094, 3265
CompTox Dashboard (EPA)	DTXSID5030030 ;
	InChI InChI=1S/C4HF9O3S/c5-1(6,3(9,10)11)2(7,8)4(12,13)17(14,15)16/h(H,14,15,16) Key: JGTNAGYHADQMCM-UHFFFAOYSA-N ; InChI=1S/C4HF9O3S/c5-1(6,3(9,10)11)2(7,8)4(12,13)17(14,15)16/h(H,14,15,16) Key: JGTNAGYHADQMCM-UHFFFAOYSA-N;
	SMILES OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F;
Properties
Chemical formula	C4HF9O3S
Molar mass	300.10 g/mol
Boiling point	210–212 °C (410–414 °F; 483–485 K)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314
Precautionary statements	P280, P305+P351+P338, P310
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Perfluorobutanesulfonic acid (PFBS) is a PFAS chemical compound having a four-carbon fluorocarbon chain and a sulfonic acid functional group. It is stable and unreactive because of the strength of carbon–fluorine bonds. It can occur in the form of a colorless liquid or solid.^[1] Its conjugate base is perfluorobutanesulfonate (also called nonaflate) which functions as the hydrophobe in fluorosurfactants.

Since June 2003, 3M has used PFBS as a replacement for the persistent, toxic, and bioaccumulative compound perfluorooctanesulfonic acid (PFOS) in its Scotchgard stain repellents.^[3]^[4]

^ ^a ^b "Perfluorobutanesulfonic acid". PubChem. NIH. Retrieved 10 August 2021.
^ ^a ^b Sigma-Aldrich Co., Nonafluorobutane-1-sulfonic acid. Retrieved on 15 January 2018.
^ Ullah, Aziz (October 2006). "The Fluorochemical Dilemma: What the PFOS/PFOA fuss is all about" (PDF). Cleaning & Restoration. Retrieved 16 January 2009.
^ Renner R (January 2006). "The long and the short of perfluorinated replacements". Environ. Sci. Technol. 40 (1): 12–3. doi:10.1021/es062612a. PMID 16433328.

[PubChem-1] "Perfluorobutanesulfonic acid". PubChem. NIH. Retrieved 10 August 2021.

[Sigma-Aldrich-2] Sigma-Aldrich Co., Nonafluorobutane-1-sulfonic acid. Retrieved on 15 January 2018.

[3] Ullah, Aziz (October 2006). "The Fluorochemical Dilemma: What the PFOS/PFOA fuss is all about" (PDF). Cleaning & Restoration. Retrieved 16 January 2009.

[long-4] Renner R (January 2006). "The long and the short of perfluorinated replacements". Environ. Sci. Technol. 40 (1): 12–3. doi:10.1021/es062612a. PMID 16433328.

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