Hypophosphorous acid

Product information:

Product Name:	Hypophosphorous acid
Synonyms:	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
CAS NO:	6303-21-5
EINECS:	228-601-5
Molecular Formula:	HO2P
Molecular Weight:	63.980501
Melting point:	-25 °C
Boiling Point:	108 °C (759.8513 mmHg)
Appearance:	colorless liquid
Storage:	no restrictions.
Applications:	1. Hypophosphorous acid is used as reducing agent for electroless plating; 2. It can be used to prevent discoloration of phosphoric acid resin; 3. It is used as esterification catalyst, the refrigerant; 4. It is used to produce hypophosphite, sodium salts, manganese salts, iron salts are generally used as nourishing substances; 5. Hypophosphorous acid is used in medicine and as reducing agent, the determination of arsenic, tellurium and separation of tantalum, niobium and other reagents. 6. It is strong reducing agent, It can be used for the preparation of sodium hypophosphite, calcium phosphate and other hypophosphite. 7. It can be used for the plating bath. Pharmaceuticals. reducing agent. general reagents. 8. It is strong reducing agent, it can be used in making sodium hypophosphite, calcium phosphate and other hypophosphite. 9. This product is widely used as 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 can be used for the preparation of Na, K, Ca, Mn, Fe and other types of hypophosphite.

Hypophosphorous acid (HPA), or phosphinic acid, is a phosphorus oxyacid and a powerful reducing agent with molecular formula H3PO2.

Hypophosphorous acid was first prepared in 1816 by the French chemist Pierre Louis Dulong (1785–1838).

The acid is prepared industrially via a two step process: Firstly, elemental white phosphorus reacts with alkali and alkaline earth hydroxides to give an aqueous solution of hypophosphites:

P₄ + 4 OH⁻ + 4 H₂O → 4 H
₂PO⁻
₂ + 2 H₂

Any phosphites produced in this step can be selectively precipitated out by treatment with calcium salts. The purified material is then treated with a strong, non-oxidizing acid (often sulfuric acid) to give the free hypophosphorous acid:

H
₂PO⁻
₂ + H⁺ → H₃PO₂

HPA is usually supplied as a 50% aqueous solution. Anhydrous acid cannot be obtained by simple evaporation of the water, as the acid readily oxidises to phosphorous acid and phosphoric acid and also disproportionates to phosphorous acid and phosphine. Pure anhydrous hypophosphorous acid can be formed by the continuous extraction of aqueous solutions with diethyl ether.

hypophosphorous acid uses:

Hypophosphorous acid is used as a decolorizing or bleaching agent in plastics, chemicals and synthetic fibers. lt is also used as a color stabilizer during the manufacturing of chemicals and plastics, including polyamides, nylon fibers,polyacrilonitrile, polyester fiber, epoxies, glycerols, fatty acid esters and alkyd resins.
Hypophosphorous acid is also used as a polycondensation and polymerization agent, reducing agent, an antioxidant and stimulant in pharmaceuticals, etc. Thus, due to the wide areas of application of Hypophosphorous acid, its consumption is expected to grow at a significant rate during the forecast period.
Hypophosphorous Acid is used in various end use industries, such as building and construction, electronics and electrical, chemical and plastics, etc. Thus, owing to the growing use of Hypophosphorous Acid in various industries,its sales is expected to increase, thereby propelling the growth of the global Hypophosphorous Acid market during the forecast period.
Hypophosphorous Acid is significantly used as a salt (sodium hypophosphite) and also in electroless nickel platingNi-P), as well as Hypophosphorous Acid is also used for reducing arenediazonium salts. Though Hypophosphorous Acid finds application in chemical industry but owing to the ll effects of Hypophosphorous Acid the United StatesDrug Enforcement Administration has assigned Hypophosphorous Acid and its salts in List I precursor chemical and Hypophosphorous Acid handlers are ordered to keep a record and reqistration etc.