Sodium Hexametaphosphate

(NaPO₃)₆

IUPAC: Sodium hexametaphosphate

CAS: 10124-56-8

Overview

SHMP is a polyphosphate used as a water softener, sequestrant, and food additive. It prevents calcium scale formation in pipes and boilers.

Composition

Element Symbol Atoms Atomic Mass
Oxygen O 18 15.9990
Sodium Na 6 22.9900
Phosphorus P 6 30.9740

Elemental Composition

O
Oxygen ×18
47.1%
Na
Sodium ×6
22.5%
P
Phosphorus ×6
30.4%

Uses

  • • Water softening
  • • Food additive (E452i)
  • • Scale inhibitor
  • • Dispersing agent

Fun Facts

  • ✦ Can sequester calcium and magnesium ions, preventing hard water problems

Structure

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+]

Properties

Type
salt
State
solid
Molar Mass
611.77 g/mol
Density
2.4840 g/cm³
Melting Point
616.0 °C
Solubility
very soluble

Molecular Descriptors

Exact Mass
611.6897
TPSA
296.0 Ų
H-Bond Donors
0
H-Bond Acceptors
18
Rotatable Bonds
0
Heavy Atoms
30
Complexity
513.0

Related Compounds

Ammonium Bicarbonate

NH₄HCO₃

Ammonium Chloride

NH₄Cl

Ammonium Sulfate

(NH₄)₂SO₄

Barium Carbonate

BaCO₃

Barium Chloride

BaCl₂

Barium Sulfate

BaSO₄

Cadmium Sulfide

CdS

Calcium Acetate

Ca(C₂H₃O₂)₂

Calcium Carbonate

CaCO₃

Calcium Citrate

Ca₃(C₆H₅O₇)₂

Frequently Asked Questions

What is Sodium Hexametaphosphate?
Sodium Hexametaphosphate ((NaPO₃)₆) is a salt compound with the IUPAC name Sodium hexametaphosphate.
What is the molecular weight of Sodium Hexametaphosphate?
Sodium Hexametaphosphate has a molar mass of 611.77 g/mol.
What state is Sodium Hexametaphosphate at room temperature?
Sodium Hexametaphosphate is a solid at room temperature.
Is Sodium Hexametaphosphate organic or inorganic?
Sodium Hexametaphosphate is classified as an inorganic compound.
What elements make up Sodium Hexametaphosphate?
Sodium Hexametaphosphate ((NaPO₃)₆) is composed of Oxygen (O), Sodium (Na), Phosphorus (P).