# Potassium Stearate

**CAS:** 593-29-3  
**PubChem CID:** [23673840](https://pubchem.ncbi.nlm.nih.gov/compound/23673840)  
**Molecular formula:** C₁₈H₃₅KO₂  
**Molar mass:** 322.6 g/mol  
**IUPAC:** potassium octadecanoate  
**SMILES:** `CCCCCCCCCCCCCCCCCC(=O)[O-].[K+]`  
**InChIKey:** `ANBFRLKBEIFNQU-UHFFFAOYSA-M`  
**InChI:** `InChI=1S/C18H36O2.K/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2-17H2,1H3,(H,19,20);/q;+1/p-1`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| PSA | 40.1 Ų |
| Hydrogen bond donors | 0 |
| Hydrogen bond acceptors | 2 |
| Rotatable bonds | 16 |
| Heavy atoms | 21 |

## 3D structure

The molecule contains 56 atoms connected by 55 chemical bonds. Interactive 3D model available at: https://molgod.org/molecule/593-29-3/

## Synonyms

- POTASSIUM STEARATE
- 593-29-3
- Potassium octadecanoate
- Octadecanoic acid, potassium salt
- Potassium stearate, pure
- Potassium n-octadecanoate
- EINECS 209-786-1
- REXANOL
- UNII-17V812XK50
- NONSOUL MK 2

## Data sources

- [PubChem CID 23673840](https://pubchem.ncbi.nlm.nih.gov/compound/23673840)
- [Wikidata](https://www.wikidata.org/wiki/Q15629420)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=593-29-3)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=593-29-3)

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