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Send EmailSodium Hypophosphite, Sodium Phosphinate, SHP, Sodium Mono Phosphate, 7681-53-0
CAS: 7681-53-0
Molecular Formula: H2NaO2P
Names and Identifiers
| Name | sodium monophosphate |
| Synonyms | SHP Chemical na-47 sodiumphosphinate sodium phosphinate sodiummonophosphate Sodium Hypophosphite sodiumhydrophosphite sodium monophosphate Phosphinicacid,sodiumsalt sodiumphosphinate(nah2po2) phosphinicacidmonosodiumsalt Phosphinic acid, sodium salt sodiumhydrogenphosphite(nah2po2) |
| CAS | 7681-53-0 |
| EINECS | 231-669-9 |
| InChI | InChI=1/Na.H3O2P/c;1-3-2/h;3H2,(H,1,2)/q+1;/p-1 |
| InChIKey | ZGKNDXOLMOFEJH-UHFFFAOYSA-M |
Physico-chemical Properties
| Molecular Formula | H2NaO2P |
| Molar Mass | 87.98 |
| Density | 1.77 g/cm3 at 20 °C |
| Water Solubility | 909g/L at 30℃ |
| Merck | 13,8703 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| 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 | Used in medicine and electroless nickel plating, also used as a strong reducing agent |
Risk and Safety
| Safety Description | 17 - Keep away from combustible material. |
| WGK Germany | 2 |
| RTECS | WB5950000 |
Upstream Downstream Industry
| Raw Materials | Sodium carbonate White phosphorus Calcium oxide |
Nature
A colorless monoclinic crystal or a pearl-luster crystal or a white crystalline powder. The relative density was 1. 388. Odorless and salty. Soluble in water, ethanol, glycerol; Slightly soluble in ammonia, ammonia; Insoluble in ether. The aqueous solution is neutral, and the solubility in water at 100 ° C. Is 667g/10g water. Deliquescence. It is relatively stable when stored in a dry state, and rapidly decomposes when heated at more than 200 ° C., and releases a toxic phosphine that can be spontaneous combustion. When exposed to strong heat will be explosive, mixed with potassium chlorate or other oxidants will be explosive. Sodium hypophosphite is a strong reducing agent that can reduce salts of gold, silver, mercury, nickel, chromium, cobalt, and the like to a metal state. Under normal pressure, heating and evaporating the sodium hypophosphite solution will cause explosion, so the evaporation should be carried out under reduced pressure.
Preparation Method
The yellow phosphorus is added to the reactor with milk of lime and sodium carbonate solution in an inert gas, and the dispersant is added. The mixture is heated to 45~90 °c for reaction, and phosphine and hydrogen are released, by filtration, the filtrate was a sodium hypophosphite solution. Carbon dioxide gas is introduced to remove calcium hydroxide dissolved therein, calcium carbonate is removed by filtration, an arsenic removing agent and a heavy metal removing agent are added to the filtrate to perform solution purification, and impurities such as arsenic and heavy metals are removed by filtration. The filtrate can be concentrated by vacuum evaporation, cooled crystallization and centrifuged. Alternatively, yellow phosphorus is reacted with hydrated lime and water in a reactor at 98 ° C. To form calcium hypophosphite, and then carbon dioxide is introduced to further remove a small amount of calcium hydroxide. Sodium hypophosphite solution is added to the calcium hypophosphite solution to react to form sodium hypophosphite, which is then purified by removing arsenic and heavy metals, and finally a sodium hypophosphite product is prepared by cooling crystallization and centrifugal separation.
Use
used in the food industry as a preservative, antioxidant. For fruits, vegetables and other substances preservation; For meat, poultry and fish with antiseptic effect.
Safety
should be stored in a cool, ventilated, dry, clean warehouse. The package is sealed, protected from moisture, and kept away from heat source and fire. They shall not be co-stored and co-transported with toxic substances and contaminated substances. Transport should be protected from rain and sun exposure. During loading and unloading, care should be taken to prevent package breakage. Water loss, can use water, sand, all kinds of fire retardants.
Reference Information
| properties | sodium hypophosphite pearl luster crystal or white crystalline powder, easily hygroscopic deliquescence; Easily soluble in water, ethanol, glycerin, insoluble in ether. Strong reducing agent, heated to 200 °c decomposition. |
| Use | use of sodium hypophosphite: it is mainly used as a reducing agent for electroless plating. Large equipment and small objects that cannot be carried out by electroplating; Complex shape objects with high precision and concave and convex patterns; Deep hole inner wall, objects with high surface hardness and wear resistance; plastic, ceramic, glass, quartz and other non-metallic materials surface metallization, to obtain a dense and uniform, and more excellent than electroplating nickel-phosphorus plating layer. Widely used in electronics, aviation, machinery, oil and other industries. It can also be used as a catalyst for synthesizing various water treatment agents, a chemical reaction, a stabilizer, an interface activator of a resin, a molecular weight regulator, a heat stabilizer, a food additive and the like. preservatives; Antioxidants. For cod Cod Liver Oil emulsion. arsenic and iodate reagent. Reducing agent. Clinical examination. Used for electroless nickel plating, and used in the pharmaceutical industry. |
| production method | sodium carbonate was used to neutralize hypophosphorous acid. The yellow phosphorus reacts with hydrated lime and water to form calcium hypophosphite, which is then metathesized with soda ash. The ratio of mass fraction of 1: 4 of yellow phosphorus and slaked lime are sequentially put into the reaction kettle, and water is added to form a slurry, and the mixture is heated and heated until 90 ℃, and the reaction is maintained for a period of time, the reaction was stopped in the absence of gas evolution. Unreacted solids were removed. The filtrate was placed in a stirred tank and bubbled with carbon dioxide while stirring to precipitate calcium hydroxide dissolved in the filtrate to form calcium carbonate. Then, the decomposition reaction was carried out by adding aqueous solution of sodium pudding, and the endpoint was measured after 0.5~1 h of reaction (clear liquid was taken and sodium carbonate solution was added, if there was no turbidity, the endpoint was reached). After the double decomposition reaction, the solution was filtered to remove the calcium carbonate precipitate, and the filtrate was concentrated in vacuum. When the temperature reached 20 ° Bé, the calcium carbonate precipitate was removed by re-filtration, and the solution was concentrated in vacuum again, evaporation was stopped when a crystalline film was present on the surface. Into the crystallization tank cooling, crystallization, centrifugal removal of mother liquor, drying to sodium hypophosphite. |
