Hypophosphorous Acid CAS 6303-21-5

CAS NO. 6303-21-5
Molecular formula: HO2P

Hypophosphorous acid is a colorless liquid and has a wide range of applications. It is a strong reducing agent, can be used for the preparation of sodium hypophosphite, calcium phosphate. It also can be used as an esterification catalyst and the refrigerant.


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*For Research or Industrial Use Only, Not for Diagnostic or Therapeutic Use.


Hypophosphorous Acid CAS 6303-21-5 Information


Hypophosphorous acid

Cas No.





HYPOPHOSPHOROUSACID,30%(W/V)SOLUTION;HYPOPHOSPHOROUSACID,50%(W/V)SOLUTION;Hypophosphorus acid: (Phosphinic acid);Hypophosphorus acid, 50% w/w aq. soln.;hypophosphorous;hypophosphorousacid(corrosiveliquid,acidic,inorganic,n.o.s.);Hypophosphorousacid,50%w/waq.soln.;HYPOPHOSPHOROUS ACID SOLUTION 50% AQUEOUS

Molecular weight


Melting Point

-25  °C

Boiling Point

108  °C (759.8513 mmHg)


colorless liquid


no restrictions



Hypophosphorous acid is a colorless liquid with a molecular formula of HO2P and a molecular weight of 63.980501 g/mol.

Hypophosphorous acid has a wide range of applications.

  • 1. Hypophosphorous acid serves as a reducing agent for electroless plating;
  • 2. It makes for preventing discoloration of phosphoric acid resin;
  • 3. It is an esterification catalyst, the refrigerant;
  • 4. It makes for producing hypophosphite, sodium salts, manganese salts, and iron salts are generally used as nourishing substances;
  • 5. Hypophosphorous acid is applied in medicine and as a reducing agent, the determination of arsenic, tellurium, and separation of tantalum, niobium, and other reagents.
  • 6. It is a strong reducing agent, and can be used for the preparation of sodium hypophosphite, calcium phosphate, and other hypophosphite.
  • 7. It can be used in making sodium hypophosphite, calcium phosphate, and other hypophosphite.
  • 8. This product is widely employed as a reducing agent, Ag, Cu, Ni, Hg, and other metals are reduced to the corresponding metal, for the verification of As, Nb, Ta, and other reagents, it makes for the preparation of Na, K, Ca, Mn, Fe and other types of hypophosphite.

Overall,  Hypophosphorous acid plays an important role in the realm of chemistry and industry. Buy Hypophosphorous acid in JHCHEMCO now!



All products sold in our store are only used for industrial applications or scientific research and other non-medical purposes, and shall not be used for human or animal consumption.


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