# Tripotassium phosphate trihydrate (CAS 22763-03-7)

**CAS:** 22763-03-7  
**PubChem CID:** [18407952](https://pubchem.ncbi.nlm.nih.gov/compound/18407952)  
**Molecular formula:** H₆K₃O₇P  
**Molar mass:** 266.31 g/mol  
**IUPAC:** tripotassium;phosphate;trihydrate  
**SMILES:** `O.O.O.[O-]P(=O)([O-])[O-].[K+].[K+].[K+]`  
**InChIKey:** `KPZYAGQLBFUTMA-UHFFFAOYSA-K`  
**InChI:** `InChI=1S/3K.H3O4P.3H2O/c;;;1-5(2,3)4;;;/h;;;(H3,1,2,3,4);3*1H2/q3*+1;;;;/p-3`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| PSA | 89.3 Ų |
| Hydrogen bond donors | 3 |
| Hydrogen bond acceptors | 7 |
| Rotatable bonds | 0 |
| Heavy atoms | 11 |

## 3D structure

The molecule contains 17 atoms connected by 10 chemical bonds. Interactive 3D model available at: https://molgod.org/molekula/22763-03-7/

## Synonyms

- tripotassium phosphate trihydrate
- RefChem:900066
- Potassium phosphate trihydrate
- 22763-03-7
- POTASSIUM PHOSPHATE TRIBASIC TRIHYDRATE
- tripotassium;phosphate;trihydrate
- H6K3O7P
- Tri-potassium phosphate trihydrate
- MFCD00151709
- Potassiumphosphatetrihydrate

## Available in the shop

[Tripotassium phosphate trihydrate (CAS 22763-03-7) — Beijing Tong Guang](https://molgod.org/sds-cards/tripotassium-phosphate-trihydrate-cas-22763-03-7-beijing-tong-guang/)

## Data sources

- [PubChem CID 18407952](https://pubchem.ncbi.nlm.nih.gov/compound/18407952)
- [Wikidata](https://www.wikidata.org/wiki/Q82487968)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=22763-03-7)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=22763-03-7)

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*Last updated: 2026-09-02 · Generator: MOL-GOD v3.12.33*