| 词条 | Dimagnesium phosphate |
| 释义 |
| Verifiedfields = changed | verifiedrevid = 446246173 | ImageFile = Magnesium phosphate dibasic.png | ImageSize = | IUPACName = | OtherNames = Magnesium hydrogen phosphate; Magnesium phosphate dibasic | Section1 = {{Chembox Identifiers | CASNo_Ref = {{cascite|correct|??}} | CASNo = 7757-86-0 | CASNo2_Ref = {{cascite|changed|??}} | CASNo2 = 7782-75-4 | CASNo2_Comment = (trihydrate) | PubChem = 123955 | ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} | ChemSpiderID = 110477 | StdInChI_Ref = {{stdinchicite|changed|chemspider}} | StdInChI = 1S/Mg.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+2;/p-2 | StdInChIKey_Ref = {{stdinchicite|changed|chemspider}} | StdInChIKey = MHJAJDCZWVHCPF-UHFFFAOYSA-L | SMILES = O=P([O-])(O)[O-].[Mg+2] }} | Section2 = {{Chembox Properties | Mg = 1 | P = 1 | H = 1 | O = 4 | Appearance = | Density = 2.13 g/cm3 trihydrate | MeltingPt = | BoilingPt = | Solubility = }} | Section3 = {{Chembox Hazards | MainHazards = | RPhrases = {{R36}}, {{R37}}, {{R38}} | NFPA-H = 0 | NFPA-F = 0 | NFPA-R = 0 | NFPA-S = | FlashPt = | AutoignitionPt = }} }}Dimagnesium phosphate is a compound with formula MgHPO4. It is a Mg2+ salt of monohydrogen phosphate. The trihydrate is well known, occurring as a mineral.[1] It can be formed by reaction of stoichiometric quantities of magnesium oxide with phosphoric acid. MgO + H3PO4 → MgHPO4 + H2O Dissolving monomagnesium phosphate in water, forms phosphoric acid and depositing a solid precipitate of dimagnesium phosphate trihydrate: Mg(H2PO4)2 + 3 H2O → Mg(HPO4).3H2O + H3PO4 The compound is used as a nutritional supplement, especially for infants and athletes. Its E number is E343.[2] See also
References1. ^{{cite book|author1=Klaus Schrödter|author2=Gerhard Bettermann|author3=Thomas Staffel|author4=Friedrich Wahl|author5=Thomas Klein|author6=Thomas Hofmann|title=Phosphoric Acid and Phosphates|series=Ullmann’s Encyclopedia of Industrial Chemistry|year=2008|publisher=Wiley-VCH|place=Weinheim|doi=10.1002/14356007.a19_465.pub3}} {{Magnesium compounds}}{{inorganic-compound-stub}}2. ^relevant part of the German “Zusatzstoff-Zulassungsverordnung”, the official German implementation of the respective regulation of the European Union 4 : Acid salts|Phosphates|Magnesium compounds|E-number additives |
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