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CAS NO:7681-53-0
EC NO:231-669-9
Sodium hypophosphite (NaPO2H2, also known as sodium phosphinate) is the sodium salt of hypophosphorous acid and is often encountered as the monohydrate, NaPO2H2·H2O.
Sodium Phosphinate is a solid at room temperature, appearing as odorless white crystals.
Sodium Phosphinate is soluble in water, and easily absorbs moisture from the air.
Sodium Phosphinate should be kept in a cool, dry place, isolated from oxidizing materials.
Sodium Phosphinate decomposes into phosphine which is irritating to the respiratory tract and disodium phosphate.
2 NaH2PO2 → PH3 + Na2HPO4
Uses
Like other hypophosphites, sodium hypophosphite can reduce metal ions back into base metal. This forms the basis for electroless nickel plating (Ni-P), which is its main industrial application.With this method, a durable nickel-phosphorus film can coat objects with irregular surfaces, such as in avionics, aviation and the petroleum field.
Sodium Phosphinate is capable of reducing nickel ions in solution to metallic nickel on metal substrates as well as on plastic substrates. The latter requires that the substrate is activated with fine particles of palladium. The resulting nickel deposit contains up to 15% phosphorus.
Sodium Phosphinate has been investigated as a food additive.
Properties
Chemical formula: NaPO2H2
Molar mass: 87.98 g/mol (anhydrous)
105.99 g/mol (monohydrate)
Appearance: white solid
Density: 0.8 g/cm3 (monohydrate)
Melting point: 310 °C (590 °F; 583 K) (monohydrate)
Solubility in water: soluble
Uses
-Used in pharmaceutical manufacturing, nickel plating, and as a laboratory reagent.
-As reagent for arsenic and iodates; prepn of hypophosphites syrup.
-The ingredient is used as an emulsifier or stabilizer ... The ingredient is used in cod-liver oil emulsions at levels not to exceed current good manufacturing practice.
About Sodium Phosphinate
Helpful information
Sodium Phosphinate is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 1 000 to < 10 000 tonnes per annum.
Sodium Phosphinate is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing and at industrial sites.
Consumer Uses
Sodium Phosphinate is used in the following products: coating products, fillers, putties, plasters, modelling clay and cosmetics and personal care products.
Other release to the environment of Sodium Phosphinate is likely to occur from: indoor use as processing aid and outdoor use as processing aid.
Article service life
Release to the environment of Sodium Phosphinate can occur from industrial use: industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal).
Other release to the environment of Sodium Phosphinate is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and outdoor use in long-life materials with high release rate (e.g. tyres, treated wooden products, treated textile and fabric, brake pads in trucks or cars, sanding of buildings (bridges, facades) or vehicles (ships)).
Sodium Phosphinate can be found in complex articles, with no release intended: vehicles covered by End of Life Vehicles (ELV) directive (e.g. personal vehicles or delivery vans).
Sodium Phosphinate can be found in products with material based on: fabrics, textiles and apparel (e.g. clothing, mattress, curtains or carpets, textile toys) and plastic (e.g. food packaging and storage, toys, mobile phones).
Widespread uses by professional workers
Sodium Phosphinate is used in the following products: coating products, fillers, putties, plasters, modelling clay and cosmetics and personal care products.
Sodium Phosphinate has an industrial use resulting in manufacture of another substance (use of intermediates).
ECHA has no public registered data on the types of manufacture using Sodium Phosphinate. Other release to the environment of Sodium Phosphinate is likely to occur from: indoor use as processing aid and outdoor use as processing aid.
Formulation or re-packing
Sodium Phosphinate is used in the following products: pH regulators and water treatment products, polymers, washing & cleaning products, water treatment chemicals, metal surface treatment products, non-metal-surface treatment products, lubricants and greases and textile treatment products and dyes.
Sodium Phosphinate has an industrial use resulting in manufacture of another substance (use of intermediates).
Release to the environment of Sodium Phosphinate can occur from industrial use: formulation of mixtures, formulation in materials, as processing aid and as processing aid.
Uses at industrial sites
Sodium Phosphinate is used in the following products: pH regulators and water treatment products, polymers, metal surface treatment products, non-metal-surface treatment products and welding & soldering products.
Sodium Phosphinate has an industrial use resulting in manufacture of another substance (use of intermediates).
Sodium Phosphinate is used for the manufacture of: chemicals, plastic products, rubber products, electrical, electronic and optical equipment, machinery and vehicles, textile, leather or fur, wood and wood products, pulp, paper and paper products and fabricated metal products.
Release to the environment of Sodium Phosphinate can occur from industrial use: as processing aid, as an intermediate step in further manufacturing of another substance (use of intermediates), in processing aids at industrial sites, as processing aid and in the production of articles.
Manufacture
ECHA has no public registered data on the routes by which Sodium Phosphinate is most likely to be released to the environment.
Sodium Phosphinate belongs to the class of inorganic compounds known as alkali metal hypophosphites. These are inorganic compounds in which the largest oxoanion is hypophosphite, and in which the heaviest atom not in an oxoanion is an alkali metal. Based on a literature review very few articles have been published on sodium phosphinate.
Sodium Phosphinate acts as a reducing agent for electroless nickel plating application, which finds its usage in the electronics and automotive industry.
Uses :
Sodium Phosphinate is used in the metal surface treatment, mainly for electroless nickel, as a chemical intermediate and food additive.
Sodium Phosphinate is used for electroless nickel plating agent and water treatment agent.
Sodium Phosphinate is also used in petroleum fields. Further, it is used as a food additive. In addition, it reduces nickel ions in solution to metallic nickel on metal substrates as well as on plastic substrates.
Formula:
NaH2PO2•H2O
Formula Weight:
105.99 (87.98anhy)
Storage & Sensitivity:
Hygroscopic. Ambient temperatures.
Solubility:
Soluble in water.
Uses
-Electroless Nickel (EN)
Sodium Phosphinate 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.
Sodium Phosphinate may be used in synthetic organic chemistry, especially in deamination via reduction of diazo derivatives.
-Reducing Agent
Sodium Phosphinate may be used as a reducing agent or antioxidant in chemical processing.
-Analytical Reagent
Sodium Phosphinate can be as use as an analytical reagent.
-Polymerization Catalyst
Sodium Phosphinate is used as a catalyst in some polymerization reactions.
-Polymer Stabilizer
Sodium Phosphinate is used as a stabilizer to prevent degradation of polymers during extrusion or in other heated processing.
-Flame Retardant
Sodium Phosphinate may be used as a partial fire retardant.
-Ion Exchange Resin
Sodium Phosphinate will provide a source of electrons in resin regeneration.
Appearance:
Sodium Phosphinate is a white crystalline powder; it is odourless and bitter.
Solubility:
Sodium Phosphinate is very soluble in water, in alcohol and glycerine, practically insoluble in ether.
Uses:
Sodium Phosphinate is used as a catalyst in different areas (acrylic polymers, electroless nickel,...).
Sodium Phosphinate is a high purity Sodium Hypophosphite solution and a clear colorless liquid, which is an effective reducing agent and antioxidant.
Sodium Phosphinate is used in the surface finishing industry for electroless nickel plating (Ni-P), which has the benefits of uniform plating thickness on metal objects, ceramics, and plastics.
Sodium Phosphinate is an efficient reducing agent that reduces nickel ions in solution to metallic nickel on metal substrates and other substrates, including plastic.
Sodium Phosphinate is also used as a catalyst for polymerization reactions and in the fiber glass industry.
Sodium Phosphinate acts as a stabilizer for polymers during thermal processing and extrusion.
Sodium Phosphinate is a source of electrons used for resin regeneration of Ion Exchange Resins.
Application Markets:
-Electroplating
-Electronics
-Automotive
-Water treatment
-Chemical manufacturing
Industrial Applications
In chemical processing, Sodium Phosphinate is used as a raw material for the production of hypophosphorous acid, as well as, a reducing agent and antioxidant. Sodium Phosphinate is a polymerization catalyst for acrylic acid-based polymers. Sodium Phosphinate is used as a stabilizer for polymers during extrusion and other thermal processing. Sodium Hypophosphite is used in the preparation of fire retardants and may be used as a partial fire retardant.
Water Treatment
Sodium Phosphinate is used in water treatment to reduce the metal ion content in industrial wastewater prior to discharge.
Sodium Phosphinate is an effective reducing agent for the removal of Nickel, Copper, and Iron.
Sodium Phosphinate is a source of electrons used for resin regeneration of Ion Exchange Resins.
Electrochemical Nickel Plating and Electroless Nickel Plating
Sodium Phosphinate is used in electrochemical nickel plating and the Electroless Nickel (EN) process. The EN process with Sodium Phosphinate produces a uniform plating thickness on metals and other materials, such as ceramics and plastics. Sodium Phosphinate is widely used as a reducing agent for the Electroless Nickel Plating in the electronics and automotive industry.
Sodium Phosphinate appears as an odourless white powder and is the sodium salt of hypophosphorous acid.
Sodium Phosphinate is largely used in electroless nickel plating but is also found in water treatment agents where it acts as a reducing agent , to reduce the metal ion content in industrial waste. Other uses include textile finishing products, washing and cleaning products and in lubricant and grease products.
Physical and Chemical Properties
Colorless monoclinic crystal or pearl luster crystal or white crystalline powder. Odorless and salty.
relative density 1.388
soluble in water, ethanol, glycerol; Slightly soluble in ammonia, ammonia; Insoluble in ether. The aqueous solution is neutral, and the solubility in water is 100g/g water.
Use
Sodium Phosphinate is used in medicine and electroless nickel plating, also used as a strong reducing agent
Sodium Phosphinate is used in the food industry as a preservative, antioxidant. For fruits, vegetables and other substances preservation; For meat, poultry and fish with antiseptic effect.
Chemical Properties
white crystalline powder or colourless crystals
Uses
Pharmaceuticals, reducing agent in electrode- less nickel plating of plastics and metals, lab reagent, substitute for sodium nitrite in smoked meats.
IUPAC names:
phosphinic acid, sodium salt
SODIUM HYPOPHOSPHITE
Sodium Hypophosphite
Sodium hypophosphite
sodium hypophosphite
Sodium hypophosphite
sodium phosphinat
Sodium phosphinate
sodium Phosphinate
sodium phosphinate
Sodium phosphinate
Sodium pophosphinate
SYNONYMS:
7681-53-0 [RN]
Hypophosphorous acid monosodium salt
MFCD09265474
Monosodium hypophosphite
Natriumphosphinat [German] [ACD/IUPAC Name]
Phosphinate de sodium [French] [ACD/IUPAC Name]
Sodium hypophosphite [Wiki]
sodium phosphinate [ACD/IUPAC Name]
WB5950000
10039-56-2 [RN]
Natriumhypophosphit [German]
Phosphinic acid monosodium salt
Phosphinic acid, sodium salt
Sodium hydrophosphite
