Human Metabolome Database Version 3.5

Showing metabocard for Rubidium (HMDB01327)

Record Information
Version 3.5
Creation Date 2006-08-16 07:16:24 -0600
Update Date 2013-05-29 13:31:11 -0600
Secondary Accession Numbers None
Metabolite Identification
Common Name Rubidium
Description Rubidium is a soft, silvery-white metallic element of the alkali metal group, present in traces amounts in human tissues and fluids. Rb-87, a naturally occurring isotope, is (slightly) radioactive. Rubidium is very soft and highly reactive, with properties similar to other elements in group 1, like rapid oxidation in air. Rubidium, particularly 87Rb, in the form of vapor, is one of the most commonly-used atomic species employed for laser cooling and Bose-Einstein condensation. Its desirable features for this application include the ready availability of inexpensive diode laser light at the relevant wavelength, and the moderate temperatures required to obtain substantial vapor pressures. Physiologically, it exists as an ion in the body. It has been found slightly increased in neoplastic human breast tissues obtained from patients at the time of mastectomy, compared to normal tissue. (PMID: 6488192 Link_out, 15820728 Link_out, 7324778 Link_out, 9630429 Link_out, 577330 Link_out).
Structure Thumb
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  1. Rubidium [UN1423]
  2. Rubidium +
Chemical Formula Rb
Average Molecular Weight 85.4678
Monoisotopic Molecular Weight 84.911789341
IUPAC Name rubidium(1+) ion
Traditional IUPAC Name rubidium(1+)
CAS Registry Number 7440-17-7
InChI Identifier InChI=1S/Rb/q+1
Chemical Taxonomy
Kingdom Inorganic
Super Class Inorganic compounds
Class Inorganic Ions and Gases
Sub Class Metals
Other Descriptors None
Substituents None
Direct Parent Not Available
Status Detected and Quantified
  • Food
  • Osmolyte, enzyme cofactor, signalling
Application Not Available
Cellular locations Not Available
Physical Properties
State Solid
Experimental Properties
Property Value Reference
Melting Point 39 °C Not Available
Boiling Point Not Available Not Available
Water Solubility Not Available Not Available
LogP Not Available Not Available
Predicted Properties
Property Value Source
LogP 0 ChemAxon
Hydrogen Acceptor Count 0 ChemAxon
Hydrogen Donor Count 0 ChemAxon
Polar Surface Area 0 A2 ChemAxon
Rotatable Bond Count 0 ChemAxon
Refractivity 0 ChemAxon
Polarizability 1.78 ChemAxon
Formal Charge 1 ChemAxon
Physiological Charge 1 ChemAxon
Not Available
Biological Properties
Cellular Locations Not Available
Biofluid Locations
  • Blood
  • Cerebrospinal Fluid (CSF)
  • Urine
Tissue Location Not Available
Pathways Not Available
Normal Concentrations
Biofluid Status Value Age Sex Condition Reference
Blood Expected but not Quantified
Not Applicable Not Available Not Available Comment Normal
  • Not Applicable
Cerebrospinal Fluid (CSF) Detected and Quantified
0.499 +/- 0.097 uM Adult (>18 years old) Not Specified Normal
Urine Detected and Quantified
1.354 (0.187-3.673) umol/mmol creatinine Adult (>18 years old) Both Comment Normal
Urine Detected and Quantified
1.84 +/- 0.46 umol/mmol creatinine Adult (>18 years old) Both Normal
  • Geigy Scient...
  • West Cadwell...
  • Basel, Switz...
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease References None
Associated OMIM IDs None
DrugBank ID Not Available
DrugBank Metabolite ID Not Available
Phenol Explorer Compound ID Not Available
Phenol Explorer Metabolite ID Not Available
FoodDB ID FDB003783
KNApSAcK ID Not Available
Chemspider ID 94865 Link_out
KEGG Compound ID C17061 Link_out
BioCyc ID Not Available
BiGG ID Not Available
Wikipedia Link Rubidium Link_out
NuGOwiki Link HMDB01327 Link_out
Metagene Link HMDB01327 Link_out
METLIN ID Not Available
PubChem Compound 105153 Link_out
PDB ID RB Link_out
ChEBI ID 49847 Link_out
Synthesis Reference Not Available
Material Safety Data Sheet (MSDS) Not Available
General References
  1. Rizk SL, Sky-Peck HH: Comparison between concentrations of trace elements in normal and neoplastic human breast tissue. Cancer Res. 1984 Nov;44(11):5390-4. Pubmed: 6488192 Link_out
  2. Barany E, Bergdahl IA, Bratteby LE, Lundh T, Samuelson G, Skerfving S, Oskarsson A: Iron status influences trace element levels in human blood and serum. Environ Res. 2005 Jun;98(2):215-23. Pubmed: 15820728 Link_out
  3. Meurling S, Plantin LO: The concentrations of trace elements in blood from healthy newborn infants. Acta Chir Scand. 1981;147(6):481-5. Pubmed: 7324778 Link_out
  4. Cornett CR, Ehmann WD, Wekstein DR, Markesbery WR: Trace elements in Alzheimer's disease pituitary glands. Biol Trace Elem Res. 1998 Apr-May;62(1-2):107-14. Pubmed: 9630429 Link_out
  5. Hagenfeldt K, Landgren BM, Plantin LO, Diczfalusy E: Trace elements in the human endometrium and decidua. A multielement analysis. Acta Endocrinol (Copenh). 1977 Jun;85(2):406-14. Pubmed: 577330 Link_out