POTASSIUM METAPHOSPHATE
Potassium Metaphosphate
CAS: 7790-53-6
Molecular Formula: KO3P
POTASSIUM METAPHOSPHATE - Names and Identifiers
| Name | Potassium Metaphosphate |
| Synonyms | Potassium Metaphosphate POTASSIUM METAPHOSPHATE Potassium polypllosphates Potassium polymetaphosphate Phosphenic acid potassium salt Potassium metaphosphate (Assay) metaphosphoric acid potassium salt Metaphosphoric acid, potassium salt metaphosphoricacid(hpo3),potassiumsalt Metaphosphoric acid (HPO3), potassium salt |
| CAS | 7790-53-6 |
| EINECS | 232-212-6 |
| InChI | InChI=1/K.HO3P/c;1-4(2)3/h;(H,1,2,3)/q+1;/p-1 |
POTASSIUM METAPHOSPHATE - Physico-chemical Properties
| Molecular Formula | KO3P |
| Molar Mass | 118.07 |
| Density | 2,393 g/cm3 |
| Melting Point | 807°C |
| Boling Point | 1320℃ [CRC10] |
| Water Solubility | g/100mL solution H2O: 0.0041 (25°C) [KRU93] |
| Appearance | White powder |
| Specific Gravity | 2.393 |
| Color | white |
| Storage Condition | Room Temprature |
| Physical and Chemical Properties | The highly polymerized linear polyphosphate may be present in a small amount in a cyclic structure of potassium trimetaphosphate, a cyclic structure of potassium tetraphosphate, and the like. As colorless to white glass-like blocks or tablets, or white fibrous crystals or powder. Odorless. Slow dissolution in water, the solubility varies with the degree of polymerization, generally 0.004%. The aqueous solution is alkaline. Soluble in sodium salt solution, in dilute inorganic acid can be rapidly dissolved, insoluble in ethanol. |
| Use | Used as analytical reagents, but also for the synthesis of dyes, pharmaceuticals |
POTASSIUM METAPHOSPHATE - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
POTASSIUM METAPHOSPHATE - Reference Information
Open Data Unverified Data
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| identification test | 1g of sample is soluble in 100mI. 4% sodium acetate solution. The flame color reaction was light purple. Take 0.1g of sample, Add 10ml of water and 0.4g of sodium acetate, dissolve and add dilute acetic acid solution (TS-2) to make it weakly acidic. When 3ml of silver nitrate test solution (TS-210) is added, white precipitate should be produced. Take 0.5g of sample, Add 10ml of nitric acid and 50ml of water, mix, boil for about 30min, and let cool. The phosphate test (IT-26) and potassium test (IT-27) of this solution were positive. Take 1g of sample, grind into fine powder, slowly add to 2% sodium chloride solution 100ml, while strongly stirring, should form a gel-like material. |
| content analysis | a sample of approximately mg was accurately weighed. 15ml of nitric acid and 30ml of water were added, mixed, boiled for 30min, and diluted to 100ml with water. The mixture was heated at 60 °c, and an excess of ammonium molybdate solution (TS-22) was added and heated at 50 °c for 30min. Filtration, washing the precipitate with dilute nitric acid (1ml in 36ml water) followed by washing with 1% potassium nitrate solution, until the filtrate is no longer acidic (to litmus). The precipitate was dissolved in 50ml of 1.0mol/L sodium hydroxide solution, phenolphthalein test solution (TS-167) was added several drops, and the remaining sodium hydroxide was titrated with 1.0mol/L sulfuric acid. Each ml of 1.0mol/L sodium hydroxide is equivalent to P205 3.086mg. |
| toxicity | ADI 0-70 (total amount of phosphoric acid as P; FAO/WHO,2001). Reports of renal calculi in large doses. |
| usage limit | FAO/WHO(1984,g/kg): meat soup 1000mg/kg; Cheese 9; milk powder, cream powder 5; Condensed milk, cream, edible ice and ice mixture 2; Lunch meat, pickled meat 3. |
| Use | fat emulsifier; Humectant; Water softener; Metal ion chelating agent; Tissue improver (mainly used in aquatic condiment), dosage 0.6% ~ 1.2%; Dry products; Surimi products, dosage 0.1%; Ice cream, dosage 0.03% ~ 0.1%; Protein precipitation agent. emulsifiers; Humectants; Chelating agents; Stabilizers; Tissue improvers; Binders; Color fixatives; Antioxidants; Preservatives. EEC is mainly used for meat products, cheese and condensed milk. used as analytical reagent, also used in the synthesis of dyes and medicines |
| production method | It is obtained by mixing potassium dihydrogen phosphate and potassium dihydrogen phosphate, and heating and dehydrating, and the main component thereof is potassium tripolyphosphate. The intramolecular dehydration condensation is generally carried out by heating potassium dihydrogen phosphate to 400 to 700 ° C. (theoretically, heating to about 200 ° C.) and maintaining it for several hours. The degree of polymerization of the finished product depends on the temperature and time of heating. In order to increase the degree of polymerization, 850%: condensation is also useful. |
Last Update：2025-05-26 12:12:02
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