Perfluorobutane sulfonic acid

Chemical Name	Perfluorobutane sulfonic acid
Synonym(s)	1,1,2,2,3,3,4,4,4-Nonafluoro-1-butanesulfonic acid \| 1,1,2,2,3,3,4,4-Octafluoro-1,4-diiodobutane \| 1,4-Diiodoperfluorobutane \| 1-Butanesulfonic acid, nonafluoro- \| 1-Perfluorobutanesulfonic acid \| Butane, 1,1,2,2,3,3,4,4-octafluoro-1,4-diiodo- \| Butane, octafluoro-1,4-diiodo- \| Nonafluoro-1-butanesulfonic acid \| Nonafluorobutane-1-sulfonic-acid \| Nonafluorobutanesulfonic acid \| PFBS \| Perfluoro-1-butanesulfonate \| Perfluorobutane Sulfonate \| Perfluorobutane sulfonic acid \| Perfluorobutanesulfonic acid
CASRN	375-73-5
De minimis Limit %	1
M,P/OU Threshould (lb)	100/100
Listing Type	Individually listed chemical
Effective Date	01-JAN-22
Chemical Qualifier	No
Metal	No
Chemical of Special Concern	No
Per- or Polyfluoroalkyl Substance	Yes

Rulemaking Changes Affecting This Chemical

Status	Effective Reporting Year	FR Proposed Rule	FR Final Rule
Added	2022	No proposed rule for this action	87 FR 42651 (7/18/2022)

Structural image
Structural representation of Perfluorobutane sulfonic acid