Wikipedia:WikiProject Chemicals/Chembox validation/VerifiedDataSandbox and Monosodium phosphate: Difference between pages
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Saving copy of the {{chembox}} taken from revid 444018318 of page Monosodium_phosphate for the Chem/Drugbox validation project (updated: 'ChEMBL'). |
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{{ambox | text = This page contains a copy of the infobox ({{tl|chembox}}) taken from revid [{{fullurl:Monosodium_phosphate|oldid=444018318}} 444018318] of page [[Monosodium_phosphate]] with values updated to verified values.}} |
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| Verifiedfields = changed |
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{{chembox |
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| Watchedfields = changed |
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| verifiedrevid = |
| verifiedrevid = 462253577 |
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| ImageFile1 = monosodium phosphate.png |
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| ImageSize1 = 150px |
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| ImageFileL1 = 2-dihydrogenphosphate-3D-balls.png |
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| ImageFile2 = Sodium-dihydrogen-phosphate-3D-vdW.png |
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| ImageSizeL1 = 140 |
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| ImageSize2 = 140px |
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| ImageCaption2 = {{legend|orange|Phosphorus, P}}{{legend|red|Oxygen, O}}{{legend|white|Hydrogen, H}}{{legend|rgb(160, 84, 232)|Sodium, Na}} |
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| ImageFileR1 = Sodium-3D.png |
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| ImageSizeR1 = 90 |
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| ImageNameR1 = The sodium cation |
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| IUPACName = Sodium dihydrogen phosphate |
| IUPACName = Sodium dihydrogen phosphate |
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| OtherNames = {{ubl|Monobasic sodium phosphate|Sodium biphosphate}} |
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| OtherNames = |
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| Section1 = {{Chembox Identifiers |
| Section1 = {{Chembox Identifiers |
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| CASNo = 7558-80-7 |
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| CASNo_Ref = {{cascite|correct|CAS}} |
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| UNII_Ref = {{fdacite|changed|FDA}} |
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| UNII = KH7I04HPUU |
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| ChEMBL_Ref = {{ebicite|correct|EBI}} |
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| PubChem = 24204 |
| PubChem = 24204 |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID = 22626 |
| ChemSpiderID = 22626 |
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| ChEBI_Ref = {{ebicite|correct|EBI}} |
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| ChEBI = 37585 |
| ChEBI = 37585 |
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| SMILES = [Na+].[O-]P(=O)(O)O |
| SMILES = [Na+].[O-]P(=O)(O)O |
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| StdInChI_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChI=1S/Na.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1 |
| StdInChI = 1S/Na.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1 |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey = AJPJDKMHJJGVTQ-UHFFFAOYSA-M |
| StdInChIKey = AJPJDKMHJJGVTQ-UHFFFAOYSA-M |
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}} |
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| Section2 = {{Chembox Properties |
| Section2 = {{Chembox Properties |
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| Formula = {{chem2|NaH2PO4}} |
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| Na=1|H=2|P=1|O=4 |
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| MolarMass = 119.98 g/mol |
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| Appearance = White powder or crystals |
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| Density = 2.36 g/cm<sup>3</sup> (anhydrous) |
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| MeltingPt = |
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| BoilingPt = |
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| Solubility = 59.90 g/(100 mL) (0°C) |
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}} |
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| Section7 = {{Chembox Hazards |
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| ExternalSDS = |
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| NFPA-H = 0 |
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| NFPA-F = 0 |
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| NFPA-R = 0 |
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| MainHazards = |
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| MainHazards = |
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| Section8 = {{Chembox Related |
| Section8 = {{Chembox Related |
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| OtherAnions = |
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| OtherCations = {{ubl|[[Monopotassium phosphate]]|[[Monoammonium phosphate]]}} |
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| OtherCompounds = {{ubl|[[Disodium phosphate]]|[[Trisodium phosphate]]}} |
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'''Monosodium phosphate''' ('''MSP'''), also known as '''monobasic sodium phosphate''' and '''sodium dihydrogen phosphate''', is an [[inorganic compound]] with the [[chemical formula]] {{chem2|NaH2PO4|auto=1}}. It is a [[sodium]] [[Salt (chemistry)|salt]] of [[phosphoric acid]]. It consists of sodium [[cations]] ({{chem2|Na+}}) and [[dihydrogen phosphate]] [[anions]] ({{chem2|H2PO4−}}). One of many [[sodium phosphates]], it is a common [[chemical industry|industrial chemical]]. The salt exists in an [[anhydrous]] form, as well as [[hydrate|monohydrate and dihydrate]] ({{chem2|NaH2PO4*H2O}} and {{chem2|NaH2PO4*2H2O}} respectively).<ref name=Ullmann>{{Ullmann|first1=Klaus|last1=Schrödter|first2=Gerhard|last2=Bettermann|first3=Thomas |last3=Staffel|first4=Friedrich|last4=Wahl|first5=Thomas|last5=Klein||first6=Thomas|last6=Hofmann|title=Phosphoric Acid and Phosphates|year=2008|doi=10.1002/14356007.a19_465.pub3}}</ref> |
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==Production and reactions== |
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The salt is obtained by partial neutralization of [[phosphoric acid]]. The [[pKa|p''K''<sub>a</sub>]] of monosodium phosphate is 6.8-7.2 (depending on the [[Physical chemistry|physicochemical]] characteristics during p''K''<sub>a</sub> determination).<ref>Salaun, F.: [http://www.prodinra.inra.fr/prodinra/pinra/data/2008/04/PROD2008990fa814_20080417115100287.pdf "Influence of mineral environment on the buffering capacity of casein micelles"] {{Webarchive|url=https://web.archive.org/web/20120313062736/http://www.prodinra.inra.fr/prodinra/pinra/data/2008/04/PROD2008990fa814_20080417115100287.pdf |date=2012-03-13}}, "Milchwissenschaft", 62(1):3</ref> |
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Heating this salt above 169 °C gives [[disodium pyrophosphate]]: |
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:{{chem2|2 NaH2PO4 → Na2H2P2O7 + H2O}} |
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When heated at 550 °C, [[anhydrous]] [[trisodium trimetaphosphate]] is formed:<ref>{{cite book |doi=10.1002/9780470132340.ch26|chapter=Sodium Metaphosphates |year=1950 |last1=Bell |first1=R. N. |title=Inorganic Syntheses |pages=103–106 |isbn=9780470132340|volume=3}}</ref> |
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:{{chem2|3 NaH2PO4 → Na3P3O9 + 3 H2O}} |
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==Uses== |
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Phosphates are often used in foods and in water treatment. The [[pH]] of such formulations is generally adjusted by mixtures of various [[sodium phosphates]], such as this salt.<ref name=Ullmann/> |
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The [[sodium chloride]] equivalent value, or E-Value, is 0.49.{{cln|reason=What is "E-value"??? Please clear this jargon for an average mortal human being!|date=December 2023}} It is soluble in 4.5 parts water.{{cln|reason=What on this Earth is "parts water"??? Please clear this jargon for an average mortal human being! Define this ambiguous unit of measurement in terms of the SI units!|date=December 2023}} |
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===Food additive=== |
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It is added in [[animal feed]], [[toothpaste]], and [[evaporated milk]]. It is used as a [[thickening agent]] and [[emulsifier]]. |
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===Detection of magnesium=== |
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Monosodium phosphate is used to detect the presence of [[magnesium]] [[ions]] in [[Salt (chemistry)|salts]]. Formation of a white precipitate on the addition of [[ammonium chloride]], [[ammonium hydroxide]] and monosodium phosphate to an [[aqueous]] or dilute [[Hydrogen chloride|HCl]] solution of the salt indicates presence of magnesium ions. |
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==Notes== |
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{{reflist}} |
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{{Sodium compounds}} |
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{{Phosphates}} |
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{{Mineral supplements}} |
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[[Category:Phosphates]] |
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[[Category:Sodium compounds]] |
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[[Category:Edible thickening agents]] |