# Potassium 11-chloroeicosafluoro-3-oxaundecane-1-sulfonate

**CAS:** 83329-89-9  
**PubChem CID:** [50851128](https://pubchem.ncbi.nlm.nih.gov/compound/50851128)  
**Molecular formula:** C₁₀ClF₂₀KO₄S  
**Molar mass:** 670.69 g/mol  
**IUPAC:** potassium 2-(8-chloro-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-hexadecafluorooctoxy)-1,1,2,2-tetrafluoroethanesulfonate  
**SMILES:** `C(C(C(C(C(F)(F)Cl)(F)F)(F)F)(F)F)(C(C(C(OC(C(F)(F)S(=O)(=O)[O-])(F)F)(F)F)(F)F)(F)F)(F)F.[K+]`  
**InChIKey:** `BDKYEEMJFNONPU-UHFFFAOYSA-M`  
**InChI:** `InChI=1S/C10HClF20O4S.K/c11-7(24,25)5(20,21)3(16,17)1(12,13)2(14,15)4(18,19)6(22,23)8(26,27)35-9(28,29)10(30,31)36(32,33)34;/h(H,32,33,34);/q;+1/p-1`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| PSA | 74.8 Ų |
| Hydrogen bond donors | 0 |
| Hydrogen bond acceptors | 24 |
| Rotatable bonds | 11 |
| Heavy atoms | 37 |

## 3D structure

The molecule contains 37 atoms connected by 36 chemical bonds. Interactive 3D model available at: https://molgod.org/molecule/83329-89-9/

## Synonyms

- 83329-89-9
- Potassium 11-chloroeicosafluoro-3-oxaundecane-1-sulfonate
- RefChem:373684
- DTXCID701079633
- SCHEMBL25287986
- MSK157675K
- PD192653
- NS00117956
- 8:2 CHLORINATED POLYFLUORINATED ETHER SULFONATE
- 11-Chloro-3-oxa-perfluoroundecanesulfonic acid potassium salt

## Data sources

- [PubChem CID 50851128](https://pubchem.ncbi.nlm.nih.gov/compound/50851128)
- [Wikidata](https://www.wikidata.org/wiki/Q81982140)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=83329-89-9)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=83329-89-9)

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*Last updated: 2026-10-17 · Generator: MOL-GOD v3.12.33*