Skip to main content

Phosphonic acid

ADVERTISEMENT
Identification
Molecular formula
H3PO3
CAS number
13598-36-2
IUPAC name
phosphonic acid
State
State

At room temperature, phosphonic acid is generally in a solid state, characterized by its white crystalline appearance.

Melting point (Celsius)
42.00
Melting point (Kelvin)
315.15
Boiling point (Celsius)
213.00
Boiling point (Kelvin)
486.15
General information
Molecular weight
82.00g/mol
Molar mass
82.0000g/mol
Density
1.6510g/cm3
Appearence

Phosphonic acid appears as a white, opaque, and highly hygroscopic crystalline solid.

Comment on solubility

Solubility of Phosphonic Acid (H3PO3)

Phosphonic acid, or H3PO3, showcases intriguing solubility characteristics that are crucial for its various applications:

  • Solubility in Water: H3PO3 is highly soluble in water, which facilitates its use in numerous aqueous reactions.
  • Temperature Dependence: Its solubility increases with temperature, typifying many acids where elevated temperatures enhance dissolution.
  • Effect of pH: The solubility of phosphonic acid can be influenced by pH levels; at higher pH, deprotonation might lead to increased ionization, thus affecting its solubility.
  • Comparison to Similar Compounds: When compared to phosphoric acid (H3PO4), phosphonic acid is less acidic, yet its strong solubility in water makes it particularly versatile.

As H3PO3 readily dissolves in water, it becomes an essential player in chemical processes, exemplifying the significance of solubility in chemical behavior and application.

Interesting facts

Interesting Facts about Phosphonic Acid

Phosphonic acid, commonly referred to as phosphorous acid, is an intriguing compound with various applications and noteworthy properties. Here are some fascinating insights:

  • Chemical Structure: Phosphonic acid features a phosphorus atom bonded to three hydroxyl groups and one double bond to an oxygen atom, creating a distinctive tetrahedral geometry.
  • Acidity: As a weak acid, phosphonic acid displays unique reactivity. It can donate protons in specific conditions, making it useful for chemical synthesis and various industrial processes.
  • Applications: This compound finds its utility in multiple sectors, including:
    • Agriculture: Used as a phosphorus source in fertilizers and as a fungicide.
    • Pharmaceuticals: Acts as a building block for drugs and can also play a role in antimicrobial agents.
    • Water Treatment: Helps in the removal of metal ions and aids in corrosion inhibition.
  • Biochemistry: Phosphonic acid derivatives play crucial roles in biochemical processes and have been studied for their potential in disrupting harmful bacterial growth.
  • Historical Significance: Originally isolated in the late 19th century, phosphonic acid has contributed to the development of various research fields, including agrochemistry and organic synthesis.

In scientific research, phosphonic acid demonstrates the versatility of phosphorus-based compounds, continually captivating the interest of chemists and biochemists alike. As we explore its multifaceted applications, one can appreciate how compounds like phosphonic acid bridge the gap between simple chemistry and complex biological processes.

Synonyms
Phosphonsaeure
phosphorige Saeure
trihydroxidophosphorus
Phosphorous acid, ortho
O-PHOSPHOROUS ACID
trioxophosphoric(3-) acid
H2PHO3
(HO)2HPO
HPO(OH)2
hydridodihydroxidooxidophosphorus
(PHO(OH)2)
P(OH)3
trihydrogen trioxophosphate(3-)
DTXCID5015511
DTXCID6029674
hydridotrioxophosphoric(2-) acid
(P(OH)3)
dihydrogen hydridotrioxophosphate(2-)
233-663-1
237-066-7