Perfluorobutanesulfonic acid

Perfluorobutanesulfonic acid

Names
Preferred IUPAC name Perfluorobutanesulfonic acid
Systematic 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 N 59933-66-3 N
ChemSpider	61132 Y
EC Number	206-793-1
Jmol 3D model	Interactive image
PubChem	67815
RTECS number	EK5930000
UN number	3094, 3265
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) Y Key: JGTNAGYHADQMCM-UHFFFAOYSA-N Y 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
Melting point	76 to 84 °C (169 to 183 °F; 349 to 357 K)
Boiling point	211 °C (412 °F; 484 K)
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Perfluorobutanesulfonic acid (PFBS) is a chemical compound with a four carbon fluorocarbon chain and a sulfonic acid functional group. As an anion it functions as a stable fluorosurfactant because of the strength of carbon–fluorine bonds.

PFBS has served as a replacement for the persistent, toxic, and bioaccumulative perfluorooctanesulfonic acid (PFOS) in 3M's Scotchgard stain repellents since June 2003. PFBS has a much shorter half-life in people than PFOS (a little over one month vs. 5.4 years). While PFBS is expected to be persistent in the environment, multiple studies indicate that PFBS is neither toxic nor bioaccumulative.

3M markets surfactant with PFBS in two fluorosurfactants.

See also

• PFOA
• PFNA