# Hexasodium hexametaphosphate

**CAS:** 10124-56-8  
**PubChem CID:** [24968](https://pubchem.ncbi.nlm.nih.gov/compound/24968)  
**Molecular formula:** Na₆O₁₈P₆  
**Molar mass:** 611.77 g/mol  
**IUPAC:** hexasodium;2,4,6,8,10,12-hexaoxido-1,3,5,7,9,11-hexaoxa-2lambda5,4lambda5,6lambda5,8lambda5,10lambda5,12lambda5-hexaphosphacyclododecane 2,4,6,8,10,12-hexaoxide  
**SMILES:** `[O-]P1(=O)OP(=O)(OP(=O)(OP(=O)(OP(=O)(OP(=O)(O1)[O-])[O-])[O-])[O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+]`  
**InChIKey:** `GCLGEJMYGQKIIW-UHFFFAOYSA-H`  
**InChI:** `InChI=1S/6Na.H6O18P6/c;;;;;;1-19(2)13-20(3,4)15-22(7,8)17-24(11,12)18-23(9,10)16-21(5,6)14-19/h;;;;;;(H,1,2)(H,3,4)(H,5,6)(H,7,8)(H,9,10)(H,11,12)/q6*+1;/p-6`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| PSA | 296 Ų |
| Hydrogen bond donors | 0 |
| Hydrogen bond acceptors | 18 |
| Rotatable bonds | 0 |
| Heavy atoms | 30 |

## 3D structure

The molecule contains 30 atoms connected by 24 chemical bonds. Interactive 3D model available at: https://molgod.org/molecule/10124-56-8/

## Synonyms

- Hexasodium hexametaphosphate
- Chemi-charl
- Calgon S
- Calgon (old)
- Caswell No. 772
- Hexasodium metaphosphate
- Phosphate, sodium hexameta
- FEMA 3027
- HSDB 5053
- Natrium hexametaphosphat

## Data sources

- [PubChem CID 24968](https://pubchem.ncbi.nlm.nih.gov/compound/24968)
- [Wikidata](https://www.wikidata.org/wiki/Q3116769)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=10124-56-8)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=10124-56-8)

---

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