dipotassium phosphate

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| Watchedfields = changed

| verifiedrevid = 433052081

| Name =

| ImageFile = Di-potassium monohydrogen phosphate.svg

| ImageSize = 150px

| ImageFile1 = Hydrogenfosforečnan draselný.JPG

| ImageFile2 = Dipotassium-phosphate-3D-vdW.png

| ImageSize1 = 180px

| IUPACName = Potassium hydrogen phosphate

| OtherNames = Potassium monohydrogen phosphate
Phosphoric acid dipotassium salt
Potassium phosphate dibasic

| Section1 = {{Chembox Identifiers

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 22858

| ChEMBL_Ref = {{ebicite|changed|EBI}}

| ChEMBL = 1200459

| ChEBI_Ref = {{ebicite|changed|EBI}}

| ChEBI = 131527

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = CI71S98N1Z

| UNII1_Ref = {{fdacite|correct|FDA}}

| UNII1 = RJK174X3TZ

| UNII1_Comment = (trihydrate)

| InChI = 1/2K.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2

| SMILES = [K+].[K+].[O-]P([O-])(=O)O

| InChIKey = ZPWVASYFFYYZEW-NUQVWONBAH

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/2K.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = ZPWVASYFFYYZEW-UHFFFAOYSA-L

| CASNo = 7758-11-4

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo2 = 16788-57-1

| CASNo2_Ref = {{cascite|correct|CAS}}

| CASNo2_Comment = (trihydrate)

| PubChem = 24450

| EINECS = 231-834-5

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| Section2 = {{Chembox Properties

| Formula = K₂HPO₄

| MolarMass = 174.2 g/mol

| Appearance = white powder
deliquescent

| Odor = odorless

| Density = 2.44 g/cm³

| Solubility = 149.25 g/100 mL (20 °C)

| SolubleOther = slightly soluble in alcohol

| MeltingPt= >

| MeltingPtC = 465

| MeltingPt_notes = decomposes

| pKa = 12.4

| pKb = 6.8

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| Section7 = {{Chembox Hazards

| ExternalSDS =

| NFPA-H = 1

| NFPA-F = 0

| NFPA-R = 0

| MainHazards =

| FlashPt = Non-flammable

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| Section8 = {{Chembox Related

| OtherAnions =

| OtherCations = Disodium phosphate
Diammonium phosphate

| OtherCompounds = Monopotassium phosphate
Tripotassium phosphate

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Dipotassium phosphate (also dipotassium hydrogen orthophosphate or potassium phosphate dibasic) is the inorganic compound with the formula K₂HPO₄^.(H₂O)_x (x = 0, 3, 6). Together with monopotassium phosphate (KH₂PO₄^.(H₂O)_x), it is often used as a fertilizer, food additive, and buffering agent.{{Ullmann|author1=Klaus Schrödter|author2=Gerhard Bettermann|author3=Thomas Staffel|author4=Friedrich Wahl|author5=Thomas Klein|author6=Thomas Hofmann|title=Phosphoric Acid and Phosphates|doi=10.1002/14356007.a19_465.pub3|year=2012}} It is a white or colorless solid that is soluble in water.

It is produced commercially by partial neutralization of phosphoric acid with two equivalents of potassium chloride:

: H₃PO₄ + 2 KCl → K₂HPO₄ + 2 HCl