6:2-Fluorotelomersulfonic acid

6:2-fluorotelomersulfonic acid (6:2-FTS) is a chemical compound that belongs to the group of fluorotelomersulfonic acids within the broader class of per- and polyfluorinated alkyl compounds (PFAS). Due to its structural similarity to perfluorooctanesulfonic acid (PFOS), it is also called H 4 PFOS .[2]

6:2-Fluorotelomersulfonic acid
Names
Other names
6:2 Fluorotelomer Sulfonate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.044.149
EC Number
  • 248-580-6
UNII
  • InChI=1S/C15H18F13NO5S2/c1-9(2,7-36(32,33)34)29-8(30)3-5-35(31)6-4-10(16,17)11(18,19)12(20,21)13(22,23)14(24,25)15(26,27)28/h3-7H2,1-2H3,(H,29,30)(H,32,33,34)
    Key: VIONGDJUYAYOPU-UHFFFAOYSA-N
  • CC(C)(CS(=O)(=O)O)NC(=O)CCS(=O)CCC(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F
Properties
C8H5F13O3S
Molar mass 428.16 g·mol−1
Appearance White to light brown solid
Density 1.953 g/cm³ (at 20 °C)
Melting point 87 °C (189 °F; 360 K)
58 g/l in water (20 °C)
Acidity (pKa) 1.31
Hazards
GHS labelling:[1]
GHS05: CorrosiveGHS07: Exclamation markGHS08: Health hazard
Danger
H302, H314, H373
P260, P264, P264+P265, P270, P280, P301+P317, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P319, P321, P330, P363, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Production

6:2-Fluorotelomersulfonic acid is produced via telomerization. In addition, it is also formed, for example, from some perfluorocarboxybetaines after their splitting.[3]

Usage

6:2-Fluorotelomersulfonic acid and its derivatives are used as a replacement product for perfluorooctanesulfonic acid (PFOS) or its salts in fire-fighting foams.

References
  1. "1-Octanesulfonic acid, 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-". pubchem.ncbi.nlm.nih.gov.
  2. "Comparison of the chemical structural formula of 6:2 FTCA/6:2 FTSA and... | Download Scientific Diagram".
  3. "zwitterionic carboxybetaine polymer: Topics by Science.gov". www.science.gov.
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