磷酸氢镁(三水)
MAGNESIUM HYDROGEN ORTHOPHOSPHATE
CAS: 7757-86-0
Molecular Formula: HMgO4P
磷酸氢镁(三水) - Names and Identifiers
磷酸氢镁(三水) - Physico-chemical Properties
| Molecular Formula | HMgO4P |
| Molar Mass | 120.284301 |
| Density | 2.130 |
| Melting Point | decomposes at 550–650℃ [HAW93] |
| Water Solubility | slightly soluble H2O; soluble dilute acids [MER06] |
| Appearance | white powder |
| Stability | Stable. |
| Physical and Chemical Properties | See magnesium hydrogen phosphate. |
磷酸氢镁(三水) - References
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | Adl 0~70 mg/kg (based on phosphorus, FAO/WHO,1984). generally recognized as safe (US Food and Drug Administration, 1985). |
| use | used as a nutritional supplement in the food industry. used as plastic stabilizer, fertilizer ammonium bicarbonate stabilizer, dental abrasive. It is the raw material for the manufacture of drugs for the treatment of rheumatoid arthritis. |
| production method | magnesium oxide method adds thermal phosphoric acid to the reactor, slowly adds magnesium oxide under stirring for neutralization reaction, controls the Ph value to be about 5, filters, crystallizes the filtrate by cooling, controls the crystallization temperature to be above 36 ℃, and then centrifuges for dehydration and drying to obtain magnesium hydrogen phosphate trihydrate finished product. Its H3PO4 MgO 2H2O → MgHPO4?3H2O Industrial production is generally prepared by the reaction of thermal phosphoric acid with light magnesium oxide or soluble magnesium salts (magnesium carbonate, magnesium chloride). For the magnesium oxide method, see magnesium hydrogen phosphate, add the process of purifying the solution with arsenic removal agent and heavy metal removal agent, and filtering to remove impurities such as arsenic and heavy metals. |
Last Update：2024-04-09 20:52:54
