Nonafluoro-1-butanesulfonic Acid

CAS No. 375-73-5

Formula: C4HF9O3S
Basic Info

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). PFBS is persistent in the environment. Studies have not yet been specifically conducted to determine safety in humans.
3M markets surfactant with PFBS in two fluorosurfactants.

Formula
C4HF9O3S
Molecular Weight
300.1
Exact Mass
299.95
LogP
3.3807
PSA
62.75
Synonyms

1,1,2,2,3,3,4,4,4-Nonafluorobutane-1-sulfonic acid

Nonafluorobutane-1-sulfonic acid

NONAFLUORO-1-BUTANESULFONIC ACID

Perfluoro-1-butanesulfonic Acid

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Properties
Density
1.811 g/mL at 25ºC(lit.)
Boiling Point
112-114ºC14 mm Hg(lit.)
Flash Point
>230 °F
Refractive Index
n20/D 1.3230(lit.)
Safety Info
RTECS
EK5930000
Safety Statements
S26; S36/37/39; S45
WGK Germany
3
Risk Statements
R14; R22; R34
HS Code
2904909090
RIDADR
UN 3265 8/PG 2
Hazard Codes
Spectrum
NMR Spectrum 1H NMR : Predict
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Synthesis Route
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