Phosphonic Acid (Phosphorous Acid)

What is Phosphonic Acid (Phosphorous Acid)?

Molecular Formula (Phosphonic Acid (Phosphorous Acid)): H₃PO₃

Molecular Weight: 80.987 g/mol

Chemical Name: Phosphonic Acid (Phosphorous Acid)

CAS Number: 13598-36-2

It is also defined as phosphorous acid. Phosphonic Acid consists of 3 Hydrogen, 3 Oxygen, and 1 Phosphorus atom. It is a phosphorus oxoacid in solid form, where a single pentavalent phosphorus atom is covalently bonded to one hydrogen atom and two hydroxy groups, and double-bonded to one oxygen atom.

Other Names Include;

• H3PO3
• Dihydroxyphosphine Oxide
• Phosphono group
• Hydrogen Phosphonic Acid (Phosphorous Acid)
• Dihydroxy(oxo)phosphonium
• Phosphorous Acid 99%
• Phosphorous Acid Solution
• Phosphonate, Phosphonic Acid (Phosphorous Acid)
• Oxo-[E5-Phosphanediol]
• 13598-36-2
• Oxo-[E5-Phosphonic Acid (Phosphorous Acid)]
• Dihydroxy[E5-Phosphanone]
• Phosphorous acid
• Orthophosphorous acid
• o-Phosphorous acid

How is it Produced?

There are many methods for its production. The most common method in the production of Phosphonic Acid is the acidic hydrolysis of dialkyl phosphonates (e.g., using HCl) or the McKenna procedure (a two-step reaction using bromotrimethylsilane followed by methanolysis), which are the best methods for producing Phosphonic Acids.

What are its Physical and Chemical Properties?

It is a white, solid crystalline chemical.

Its melting point is 73 °C.

Its boiling point is 200 °C.

Its density is 1.651 g/mL at 25 °C.

It is a hygroscopic chemical sensitive to air.

Phosphorous Acid is stable. It is incompatible with strong bases.

It can easily absorb oxygen from the air to form phosphoric acid.

Phosphonic Acid reacts exothermically with chemical bases, such as amines and inorganic hydroxides, to form salts.

What are the Uses of Phosphonic Acid (Phosphorous Acid)?

• Phosphonic Acid is used as an intermediate in the preparation of other phosphorous compounds.
• Phosphorous Acid is used for scale inhibition and removal to control Iron (Fe) and Manganese (Mn).
• Phosphorous Acid is the raw material used in the preparation of phosphonates for water treatment applications such as corrosion control and chlorine stabilization.
• Metal salts of phosphorous acid (phosphites) are widely used either as an agricultural fungicide or as an excellent source of phosphorous nutrition for plants.
• Phosphorous acid is used in stabilizing mixtures for plastic materials.
• Nails can suffer from certain deteriorations following intercellular disorders. For this reason, it is used in nail strengthening formulations in the skin care field of the cosmetics industry.
• Phosphorous Acid is used to protect corrosion-prone metal surfaces at high temperatures.
• It is used in the manufacture of lubricants and lubricant additives.
• It is used to initiate the polymerization of some alkenes.
• It is used in the manufacture of agricultural chemicals and anti-scaling agents.
• It is used as a coating agent and surface treatment chemical. In this field, it serves as a source of phosphate.
• It is used as a surfactant.
• Phosphorous Acid is used in the manufacture of automotive care products.
• It is used in wood and wood products.
• It is used in the manufacture of fabric, textile, and leather products.
• It is utilized for its cleaning effect in the manufacture of laundry and dishwashing products.
• It is used as a chelating agent in the cleaning of heat exchangers.
• For stabilizing plastic materials, it prevents chain reactions by reducing free radicals and hydroperoxides that break off from polymer chains.
• In the leather industry, phosphorous acid is used for the chelation of iron ions.
• Plants use phosphorus in ATP and ADP synthesis. Phosphorus is important for the formation of energy-carrying compounds in the plant. Phosphonic Acid is used to meet the plant's phosphorus needs.

What Factors Affect its Price?

Phosphorous Acid prices have generally shown an upward trend for a long time. The price of Phosphonic Acid has increased due to the expansion in the production of agricultural pesticides. The price of Phosphorous Acid is directly related to its application areas.

The price of Phosphorous Acid depends on production capacity. When a new Phosphonic Acid production facility is established, the price is likely to increase.

The most affordable sellers of Phosphorous Acid are wholesale companies.

The price of Phosphonic Acid is directly linked to the prices of the raw materials used in its production. If the price of Hydrochloric Acid increases, the price of phosphorous acid will also rise.