Record Information
Creation date2010-04-08 22:10:38 UTC
Update date2015-07-20 22:57:51 UTC
Primary IDFDB013311
Secondary Accession NumbersNot Available
Chemical Information
FooDB NamePotassium hydrogen sulfate (KHSO4)
DescriptionFood additive (seasoning); acidity regulator
CAS Number7646-93-7
Acid potassium sulfatebiospider
Monopotassium hydrogen sulfatebiospider
Monopotassium sulfatebiospider
Potassium acid sulfatebiospider
Potassium bisulfatedb_source
Potassium bisulphatebiospider
Potassium hydrogen sulfatebiospider
Potassium hydrogen sulfate [UN2509] [Corrosive]biospider
Potassium hydrogen sulfate, solidbiospider
Potassium hydrogensulphatebiospider
Potassium hydrosulfate (KHSO4)biospider
Potassium sulfate (KHSO4)db_source
Potassium sulfate, KHSO4biospider
Sal enixumdb_source
Sulfuric acid monopotassium saltbiospider
Sulfuric acid potassium salt (1:1)biospider
Sulfuric acid, monopotassium saltbiospider
Sulfuric acid, monopotassium salt, 8CIdb_source
Sulfuric acid, potassium salt (1:1)biospider
Predicted Properties
pKa (Strongest Acidic)-3ChemAxon
Physiological Charge-2ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area77.43 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity12.65 m³·mol⁻¹ChemAxon
Polarizability6.16 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Chemical FormulaHKO4S
IUPAC namepotassium hydrogen sulfate
InChI IdentifierInChI=1S/K.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+1;/p-1
Isomeric SMILES[K+].OS([O-])(=O)=O
Average Molecular Weight136.169
Monoisotopic Molecular Weight135.923261071
DescriptionThis compound belongs to the class of chemical entities known as alkali metal sulfates. These are inorganic compounds in which the largest oxoanion is sulfate, 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 sulfates
Alternative Parents
  • Alkali metal sulfate
  • Inorganic oxide
  • Inorganic salt
Molecular FrameworkNot Available
External DescriptorsNot Available
Physico-Chemical Properties - Experimental
Physico-Chemical Properties - Experimental
Physical stateNot Available
Physical DescriptionNot Available
Mass CompositionH 0.74%; K 28.71%; O 47.00%; S 23.55%DFC
Melting PointMp 214°DFC
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 Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-000i-3900000000-6e06282e3e8ec61e30cdView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0019-6900000000-331c6d9af1cd8e81b9bfView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-001r-9400000000-7ef623e199f95892ef4aView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-001i-0900000000-1f543ce7e11557840540View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-001i-0900000000-1f543ce7e11557840540View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-001i-0900000000-1f543ce7e11557840540View in MoNA
ChemSpider IDNot Available
ChEMBL IDNot Available
KEGG Compound IDNot Available
Pubchem Compound ID516920
Pubchem Substance IDNot Available
ChEBI IDNot Available
Phenol-Explorer IDNot Available
DrugBank IDNot Available
HMDB IDNot Available
CRC / DFC (Dictionary of Food Compounds) IDHSF56-M:HSF56-M
EAFUS IDNot Available
Dr. Duke IDNot Available
BIGG IDNot Available
KNApSAcK IDNot Available
HET IDNot Available
Flavornet IDNot Available
GoodScent IDNot Available
SuperScent IDNot Available
Wikipedia IDNot Available
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
FlavoursNot Available
MSDSNot Available
Synthesis ReferenceNot Available
General ReferenceNot Available
Content Reference