Record Information
Creation date2015-05-07 20:46:52 UTC
Update date2019-11-26 03:22:03 UTC
Primary IDFDB031004
Secondary Accession Numbers
  • FDB003518
Chemical Information
FooDB NameMg2+
DescriptionMagnesium, also known as magnesium ion or magnesium, ion (mg(2+)), is a member of the class of compounds known as homogeneous alkaline earth metal compounds. Homogeneous alkaline earth metal compounds are inorganic compounds containing only metal atoms,with the largest atom being a alkaline earth metal atom. Magnesium can be found in a number of food items such as cocoa bean, evening primrose, skunk currant, and chinese cabbage, which makes magnesium a potential biomarker for the consumption of these food products. Magnesium can be found primarily in blood, cerebrospinal fluid (CSF), saliva, and urine, as well as throughout most human tissues. Magnesium exists in all living species, ranging from bacteria to humans. In humans, magnesium is involved in several metabolic pathways, some of which include valdecoxib action pathway, nisoldipine action pathway, ketorolac action pathway, and nitrendipine action pathway. Magnesium is also involved in several metabolic disorders, some of which include sialuria or french type sialuria, hypophosphatasia, MNGIE (mitochondrial neurogastrointestinal encephalopathy), and phenylketonuria. Moreover, magnesium is found to be associated with alzheimer's disease, multiple sclerosis, parkinson's disease, and primary hypomagnesemia. Magnesium occurs naturally only in combination with other elements, where it invariably has a +2 oxidation state. The free element (metal) can be produced artificially, and is highly reactive (though in the atmosphere, it is soon coated in a thin layer of oxide that partly inhibits reactivity — see passivation). The free metal burns with a characteristic brilliant-white light. The metal is now obtained mainly by electrolysis of magnesium salts obtained from brine, and is used primarily as a component in aluminium-magnesium alloys, sometimes called magnalium or magnelium. Magnesium is less dense than aluminium, and the alloy is prized for its combination of lightness and strength .
CAS Number22537-22-0
Magnesium, doubly charged positive ionChEBI
Magnesium, ion (MG(2+))ChEBI
Magnesium ionsHMDB
Neuropeptide y (1-27)HMDB
Predicted Properties
pKa (Strongest Acidic)3.09ChemAxon
Physiological Charge2ChemAxon
Hydrogen Acceptor Count0ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area0 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity0 m³·mol⁻¹ChemAxon
Polarizability1.78 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Chemical FormulaMg
IUPAC namemagnesium(2+) ion
InChI IdentifierInChI=1S/Mg/q+2
Isomeric SMILES[Mg++]
Average Molecular Weight24.305
Monoisotopic Molecular Weight23.985041898
Description Belongs to the class of inorganic compounds known as homogeneous alkaline earth metal compounds. These are inorganic compounds containing only metal atoms,with the largest atom being a alkaline earth metal atom.
KingdomInorganic compounds
Super ClassHomogeneous metal compounds
ClassHomogeneous alkaline earth metal compounds
Sub ClassNot Available
Direct ParentHomogeneous alkaline earth metal compounds
Alternative ParentsNot Available
  • Homogeneous alkaline earth metal
Molecular FrameworkNot Available
External Descriptors
Physiological effect

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Physico-Chemical Properties - Experimental
Physico-Chemical Properties - Experimental
Physical stateNot Available
Physical DescriptionNot Available
Mass CompositionNot Available
Melting PointNot Available
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
SpectraNot Available
ChemSpider IDNot Available
ChEMBL IDNot Available
KEGG Compound IDNot Available
Pubchem Compound IDNot Available
Pubchem Substance IDNot Available
ChEBI IDNot Available
Phenol-Explorer IDNot Available
DrugBank IDNot Available
HMDB IDNot Available
CRC / DFC (Dictionary of Food Compounds) IDNot Available
EAFUS IDNot Available
Dr. Duke IDNot Available
BIGG IDNot Available
KNApSAcK IDNot Available
HET IDNot Available
Food Biomarker OntologyNot Available
VMH 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— U.S. Department of Agriculture, Agricultural Research Service. 2008. USDA National Nutrient Database for Standard Reference, Release 21. Nutrient Data Laboratory Home Page.