Potassium Phosphate Dibasic

K₂HPO₄

IUPAC: Dipotassium hydrogen phosphate

CAS: 7758-11-4

Overview

Dipotassium phosphate is a highly soluble salt used as a fertilizer, food additive, and buffer in biological research.

Composition

Element Symbol Atoms Atomic Mass
Hydrogen H 1 1.0080
Oxygen O 4 15.9990
Phosphorus P 1 30.9740
Potassium K 2 39.0980

Elemental Composition

H
Hydrogen ×1
0.6%
O
Oxygen ×4
36.7%
P
Phosphorus ×1
17.8%
K
Potassium ×2
44.9%

Uses

  • • Fertilizer
  • • Food additive
  • • Buffer solution
  • • Non-dairy creamer ingredient

Fun Facts

  • ✦ One of the most commonly used buffer components in molecular biology

Structure

SMILES

OP(=O)([O-])[O-].[K+].[K+]

Properties

Type
salt
State
solid
Molar Mass
174.18 g/mol
Density
2.4400 g/cm³
Solubility
1670 g/L at 20°C

Molecular Descriptors

Exact Mass
173.8887
TPSA
83.4 Ų
H-Bond Donors
1
H-Bond Acceptors
4
Rotatable Bonds
0
Heavy Atoms
7
Complexity
46.0

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 Potassium Phosphate Dibasic?
Potassium Phosphate Dibasic (K₂HPO₄) is a salt compound with the IUPAC name Dipotassium hydrogen phosphate.
What is the molecular weight of Potassium Phosphate Dibasic?
Potassium Phosphate Dibasic has a molar mass of 174.18 g/mol.
What state is Potassium Phosphate Dibasic at room temperature?
Potassium Phosphate Dibasic is a solid at room temperature.
Is Potassium Phosphate Dibasic organic or inorganic?
Potassium Phosphate Dibasic is classified as an inorganic compound.
What elements make up Potassium Phosphate Dibasic?
Potassium Phosphate Dibasic (K₂HPO₄) is composed of Hydrogen (H), Oxygen (O), Phosphorus (P), Potassium (K).