Record Information
Creation date2010-04-08 22:10:40 UTC
Update date2018-05-29 01:04:39 UTC
Primary IDFDB013359
Secondary Accession NumbersNot Available
Chemical Information
FooDB NameDisodium phosphate
DescriptionIt is used in foods as a sequestrant, emulsifier, buffering agent, absorbent, pH control agent, protein modifier, source of alkalinity, stabiliser and nutrient supplement Disodium hydrogen phosphate (Na2HPO4) is a sodium salt of phosphoric acid. It is a white powder that is highly hygroscopic and water soluble. It is therefore used commercially as an anti-caking additive in powdered products. It is also known as disodium hydrogen orthophosphate, sodium hydrogen phosphate or sodium phosphate dibasic. It is commercially available in both the hydrated and anhydrous forms.
CAS Number7558-79-4
Dibasic sodium phosphateChEBI
Disodium acid orthophosphateChEBI
Disodium hydrogen phosphateChEBI
Disodium monohydrogen phosphateChEBI
Disodium orthophosphateChEBI
Dibasic sodium phosphoric acidGenerator
Disodium phosphoric acidGenerator
Disodium acid orthophosphoric acidGenerator
Disodium hydrogen phosphoric acidGenerator
Disodium monohydrogen phosphoric acidGenerator
Disodium orthophosphoric acidGenerator
Neutral sodium hydrogen phosphateMeSH
Phosphoric acid, disodium saltMeSH
Phosphoric acid, disodium salt, 32P-labeledMeSH
Phosphoric acid, monosodium saltMeSH
Phosphoric acid, monosodium salt, anhydrousMeSH
Phosphoric acid, sodium saltMeSH
Phosphoric acid, trisodium salt , 32P-labeledMeSH
Sodium dihydrogen orthophosphateMeSH
Sodium hydrophosphateMeSH
Sodium phosphate, tribasicMeSH
Trisodium phosphateMeSH
Dibasic sodium phosphate, anhydrousMeSH
Phosphoric acid, disodium salt, heptahydrateMeSH
Phosphoric acid, sodium (2:3) saltMeSH
Sodium phosphate monobasic anhydrousMeSH
Sodium phosphate, monobasicMeSH
Sodium phosphate, tribasic, dodecahydrateMeSH
Trisodium phosphate dodecahydrateMeSH
Disodium hydrogen phosphate anhydrousMeSH
Monosodium dihydrogen phosphateMeSH
Phosphoric acid, disodium salt, anhydrousMeSH
Phosphoric acid, trisodium salt , dodecahydrateMeSH
Sodium biphosphateMeSH
Sodium dihydrogen phosphateMeSH
Sodium phosphate, dibasic (anhydrous)MeSH
Sodium phosphate, disodium saltMeSH
Disodium acid phosphateMeSH
Phosphoric acid, disodium salt, dodecahydrateMeSH
Phosphoric acid, trisodium saltMeSH
Sodium phosphateMeSH
Sodium phosphate, dibasicMeSH
Sodium phosphate, monobasic anhydrousMeSH
Di-sodium hydrogen phosphate dihydratebiospider
Di-sodium hydrogen phosphate dodecahydratebiospider
Disodium hydrogen phosphate dihydratebiospider
Disodium hydrogen phosphate dodecahydratebiospider
Disodium hydrogen phosphate, anhydrousbiospider
Disodium hydrogenorthophosphatebiospider
Disodium hydrogenphosphatebiospider
Disodium hydrophosphatebiospider
Disodium monohydrogenphosphatedb_source
Disodium phosphate, anhydrousbiospider
Exsiccated sodium phosphatebiospider
Fleet enemabiospider
Phosphate of sodabiospider
Phosphoric acid, sodium salt (1:2)biospider
Sec-sodium phosphatebiospider
Secondary sodium phosphatebiospider
Soda phosphatebiospider
Sodium acid phosphate, anhydrousbiospider
Sodium hydrogen phosphatebiospider
Sodium hydrogenphosphatebiospider
Sodium monohydrogen phosphatebiospider
Sodium monohydrogen phosphate (2:1:1)biospider
Sodium orthophosphate, secondarybiospider
Sodium phosphate (Na2HPO4)db_source
Sodium phosphate (NaHPO4)biospider
Sodium phosphate dibasicbiospider
Sodium phosphate dibasic dihydratebiospider
Sodium phosphate dibasic dodecahydratebiospider
Sodium phosphate dibasic, USANdb_source
Sodium phosphate, exsiccatedbiospider
Predicted Properties
pKa (Strongest Acidic)1.8ChemAxon
Physiological Charge-2ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area83.42 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity12.41 m³·mol⁻¹ChemAxon
Polarizability5.23 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Chemical FormulaHNa2O4P
IUPAC namedisodium hydrogen phosphate
InChI IdentifierInChI=1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
Isomeric SMILES[Na+].[Na+].OP([O-])([O-])=O
Average Molecular Weight141.9588
Monoisotopic Molecular Weight141.940784382
DescriptionThis compound belongs to the class of chemical entities known as alkali metal phosphates. These are inorganic compounds in which the largest oxoanion is phosphate, and in which the heaviest atom not in an oxoanion is an alkali metal.
KingdomChemical entities
Super ClassInorganic compounds
ClassMixed metal/non-metal compounds
Sub ClassAlkali metal oxoanionic compounds
Direct ParentAlkali metal phosphates
Alternative Parents
  • Alkali metal phosphate
  • Inorganic sodium salt
  • Inorganic oxide
  • Inorganic salt
Molecular FrameworkNot Available
External Descriptors
OntologyNo ontology term
Physico-Chemical Properties - Experimental
Physico-Chemical Properties - Experimental
Physical stateNot Available
Physical DescriptionNot Available
Mass CompositionH 0.71%; Na 32.39%; O 45.08%; P 21.82%DFC
Melting Point250 ºC decomp.
Boiling PointNot Available
Experimental Water SolubilityNot Available
Experimental logPNot Available
Experimental pKaNot Available
Isoelectric pointNot Available
ChargeNot Available
Optical RotationNot Available
Spectroscopic UV DataNot Available
DensityNot Available
Refractive IndexNot Available
Spectrum TypeDescriptionSplash KeyView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0006-2900000000-e616d474848e3ebeb9d8JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0udl-0900000000-0507c0624ef8d3a0407cJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0fkc-9400000000-16a20b129ea061b9d100JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0006-0900000000-57d1bfe7b9e452c20c0eJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0006-0900000000-57d1bfe7b9e452c20c0eJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-0900000000-57d1bfe7b9e452c20c0eJSpectraViewer
ChemSpider IDNot Available
ChEMBL IDNot Available
KEGG Compound IDC13558
Pubchem Compound ID24203
Pubchem Substance IDNot Available
ChEBI ID34683
Phenol-Explorer IDNot Available
DrugBank IDNot Available
HMDB IDNot Available
CRC / DFC (Dictionary of Food Compounds) IDHTM78-K:HTM78-K
Dr. Duke IDNot Available
BIGG IDNot Available
KNApSAcK IDNot Available
HET IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
Flavornet IDNot Available
GoodScent IDrw1099961
SuperScent IDNot Available
Wikipedia IDDisodium_phosphate
Phenol-Explorer Metabolite IDNot Available
Duplicate IDSNot Available
Old DFC IDSNot Available
Associated Foods
FoodContent Range AverageReference
Biological Effects and Interactions
Health Effects / BioactivitiesNot Available
EnzymesNot Available
PathwaysNot Available
MetabolismNot Available
BiosynthesisNot Available
Organoleptic Properties
  1. The Good Scents Company (2009). Flavor and fragrance information catalog. <> Accessed 15.10.23.
MSDSNot Available
Synthesis ReferenceNot Available
General ReferenceNot Available
Content Reference