# Sodium Phosphate, Monobasic, Dihydrate

**CAS:** 13472-35-0  
**PubChem CID:** [23673460](https://pubchem.ncbi.nlm.nih.gov/compound/23673460)  
**Molecular formula:** H₆NaO₆P  
**Molar mass:** 156.01 g/mol  
**IUPAC:** sodium;dihydrogen phosphate;dihydrate  
**SMILES:** `O.O.OP(=O)(O)[O-].[Na+]`  
**InChIKey:** `VBJGJHBYWREJQD-UHFFFAOYSA-M`  
**InChI:** `InChI=1S/Na.H3O4P.2H2O/c;1-5(2,3)4;;/h;(H3,1,2,3,4);2*1H2/q+1;;;/p-1`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| PSA | 82.6 Ų |
| Hydrogen bond donors | 4 |
| Hydrogen bond acceptors | 6 |
| Rotatable bonds | 0 |
| Heavy atoms | 8 |

## 3D structure

The molecule contains 14 atoms connected by 11 chemical bonds. Interactive 3D model available at: https://molgod.org/molecule/13472-35-0/

## Synonyms

- 13472-35-0
- Sodium dihydrogen phosphate dihydrate
- Sodium phosphate monobasic dihydrate
- Monosodium phosphate dihydrate
- Sodium phosphate, monobasic, dihydrate
- Phosphoric acid, monosodium salt, dihydrate
- Sodium phosphate dihydrate
- Monosodium dihydrogen phosphate dihydrate
- Sodium phosphate (NaH2PO4) dihydrate
- UNII-5QWK665956

## Data sources

- [PubChem CID 23673460](https://pubchem.ncbi.nlm.nih.gov/compound/23673460)
- [Wikidata](https://www.wikidata.org/wiki/Q27262757)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=13472-35-0)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=13472-35-0)

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