Sodium Hypophosphite

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Sodium Hypophosphite General Information

Chemical Name: Sodium Hypophosphite
Synonyms: Sodium Phosphinate
Chemical Formula: NaPO2H2  
Chemical Formula (monohydrate): NaPO2H2·H2O
CAS Number: 7681-53-0
CAS Number (monohydrate): 10039-56-2
EC Number (monohydrate): 231-669-9

Sodium Hypophosphite Uses

Electroless Nickel (EN) – Sodium Hypophosphite (SHP) acts as a reducing agent to supply the electrons necessary for the EN process. The EN process allows for uniform plating thickness on not only metal objects, but also plastics and ceramics.

Chemical Intermediate – Used as a raw material in the production of other products, including Hypophosphorous Acid. It may be used in synthetic organic chemistry, especially in deamination via reduction of diazo derivatives.

Reducing Agent – SHP may be used as a reducing agent or antioxidant in chemical processing.

Analytical Reagent – Sodium Hypophosphite can be as use as an analytical reagent.

Polymerization Catalyst – Used as a catalyst in some polymerization reactions.

Polymer Stabilizer – SHP is used as a stabilizer to prevent degradation of polymers during extrusion or in other heated processing.

Flame Retardant – Sodium Hypophosphite may be used as a partial fire retardant.

Ion Exchange Resin – It will provide a source of electrons in resin regeneration.

Sodium Hypophosphite Certificate of Analysis (COA)

Product Name: Sodium Hypophosphite, Mono

Quality: SMC Spec. 601

Batch: 100701/10547

Test/Property Specification Result
Appearance White Crystal White Crystal
Arsenic (As), % Less than 0.0001% Less than 0.0001%
Assay, % 102.00 % MINIMUM 103.38
Calcium (Ca), % 0.0050 % MAXIMUM 0.0018
Chloride (Cl), %   0.0031
Filtration test PASS PASS
Heavy Metals (as Lead), ppm Less than 0.0002% Less than 0.0002%
Iron (Fe), % 0.00020 % MAXIMUM 0.00004
Lead (Pb), ppm Less than 1 PPM Less than 1 PPM
Na2HPO3, % 0.50 % MAXIMUM 0.19
pH 5.5 TO 8.5 pH scale 7.0
Sulfate (SO4), % 0.0200 % MAXIMUM 0.0036


 Approval Date:  7/28/2010

 Spec Revision

Sodium Hypophosphite Material Safety Data Sheet (MSDS)