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Record Information
StatusDetected and Quantified
Creation Date2005-11-16 15:48:42 UTC
Update Date2017-10-23 19:03:52 UTC
Secondary Accession Numbers
  • HMDB01522
Metabolite Identification
Common NameMethylguanidine
DescriptionMethylguanidine (MG) is a guanidine compound deriving from protein catabolism. It is also a product of putrefaction. Methylguanidine is a suspected uraemic toxin that accumulates in renal failure, however it also exhibits anti-inflammatory effects. Methylguanidine is synthesized from creatinine concomitant with the synthesis of hydrogen peroxide from endogenous substrates in peroxisomes. Recent evidence suggests that methylguanidine significantly inhibits iNOS activity and TNF- release. This means that methylguandine can attenuate the degree of inflammation and tissue damage associated with endotoxic shock.
SynonymsNot Available
Chemical FormulaC2H7N3
Average Molecular Weight73.0971
Monoisotopic Molecular Weight73.063997239
IUPAC NameNot Available
Traditional NameNot Available
CAS Registry Number471-29-4
SMILESNot Available
InChI Identifier
Chemical Taxonomy
ClassificationNot classified

Biological Location:


  Biofluid and excreta:

  Organ and components:


Route of exposure:



Physiological effect

Health effect:



  Health condition:

    Gastrointestinal disorders:

    Psychiatric disorders:

    Renal and urinary disorders:

    Nervous system disorders:


Indirect biological role:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water Solubility1.78 mg/mLNot Available
LogPNot AvailableNot Available
Predicted PropertiesNot Available
Spectrum TypeDescriptionSplash Key
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-006x-9000000000-0b42b86da8534391928aView in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-05fr-9000000000-534633b3b3a72158d516View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-0a4i-9000000000-ee83bc75360621d86cc9View in MoNA
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-0006-9000000000-7c1f479fe12182b55b74View in MoNA
LC-MS/MSLC-MS/MS Spectrum - , positivesplash10-00di-9000000000-44511a31625f714234e5View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-00di-9000000000-c221ed32014cd06b0bfcView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00di-9000000000-83eaeeade889a9c4fad4View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-06dl-9000000000-afe740e2160d95afdac8View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-00e9-9000000000-471b2da48f84e67fff62View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-00di-9000000000-193b559c768749fc6b0bView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-9000000000-3661661b88220d227907View in MoNA
MSMass Spectrum (Electron Ionization)splash10-007o-9000000000-9397702dbb559840626eView in MoNA
1D NMR1H NMR SpectrumNot AvailableView in JSpectraViewer
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableView in JSpectraViewer
Biological Properties
Cellular Locations
  • Cytoplasm (predicted from logP)
Biofluid Locations
  • Blood
  • Cerebrospinal Fluid (CSF)
  • Saliva
  • Urine
Tissue Location
  • Brain
  • Liver
PathwaysNot Available
No entries found
Normal Concentrations
BloodDetected and Quantified<0.10 uMAdult (>18 years old)BothNormal details
BloodDetected and Quantified0.025 (0.0-0.05) uMAdult (>18 years old)BothNormal details
Cerebrospinal Fluid (CSF)Detected and Quantified < 0.050 uMAdult (>18 years old)BothNormal details
SalivaDetected and Quantified5.25+/- 3.24 uMAdult (>18 years old)BothNormal
    • Zerihun T. Dame, ...
SalivaDetected and Quantified>10 uMAdult (>18 years old)BothNormal details
UrineDetected and Quantified0.34 +/- 0.14 umol/mmol creatinineAdult (>18 years old)BothNormal details
UrineDetected but not Quantified Adult (>18 years old)MaleNormal details
UrineDetected and Quantified9.073 +/- 5.348 umol/mmol creatinineChildren (1 - 13 years old)Not Specified
    • Mordechai, Hien, ...
UrineDetected but not Quantified Adult (>18 years old)BothNormal details
UrineDetected and Quantified1.25 +/- 0.72 umol/mmol creatinineAdult (>18 years old)BothNormal
    • Geigy Scientific ...
    • West Cadwell, N.J...
    • Basel, Switzerlan...
UrineDetected and Quantified0.5 (0.29-0.87) umol/mmol creatinineAdult (>18 years old)BothNormal details
UrineDetected and Quantified2.7 (1.2-6.0) umol/mmol creatinineAdult (>18 years old)Both
Abnormal Concentrations
BloodDetected and Quantified3.3 +/- 1.3 uMAdult (>18 years old)BothChronic renal failure details
BloodDetected and Quantified1.91 +/- 0.82 uMAdult (>18 years old)Bothuremia details
BloodDetected but not Quantified Adult (>18 years old)BothPancreatic Cancer details
UrineDetected and Quantified10.32 +/- 7.817 umol/mmol creatinineChildren (1 - 13 years old)Not Specified
Eosinophilic esophagitis
    • Mordechai, Hien, ...
Associated Disorders and Diseases
Disease References
Chronic renal failure
  1. Kikuchi T, Orita Y, Ando A, Mikami H, Fujii M, Okada A, Abe H: Liquid-chromatographic determination of guanidino compounds in plasma and erythrocyte of normal persons and uremic patients. Clin Chem. 1981 Nov;27(11):1899-902. [PubMed:7296840 ]
Associated OMIM IDsNone
DrugBank IDNot Available
DrugBank Metabolite IDNot Available
Phenol Explorer Compound IDNot Available
Phenol Explorer Metabolite IDNot Available
FoodDB IDFDB005421
KNApSAcK IDNot Available
Chemspider ID9707
KEGG Compound IDC02294
BioCyc IDCPD-593
BiGG IDNot Available
Wikipedia LinkNot Available
PubChem Compound10111
ChEBI ID16628
Synthesis ReferencePhilippi, E.; Morsch, K. Preparation of methylguanidine according to Werner-Bell. Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen (1927), 60B 2120-2.
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Silwood CJ, Lynch E, Claxson AW, Grootveld MC: 1H and (13)C NMR spectroscopic analysis of human saliva. J Dent Res. 2002 Jun;81(6):422-7. [PubMed:12097436 ]
  2. Mizutani N, Hayakawa C, Ohya Y, Watanabe K, Watanabe Y, Mori A: Guanidino compounds in hyperargininemia. Tohoku J Exp Med. 1987 Nov;153(3):197-205. [PubMed:3433275 ]
  3. De Deyn PP, Marescau B, D'Hooge R, Possemiers I, Nagler J, Mahler C: Guanidino compound levels in brain regions of non-dialyzed uremic patients. Neurochem Int. 1995 Sep;27(3):227-37. [PubMed:8520461 ]
  4. Lazdins I, Dawborn JK: Concentration of guanidines in normal human plasma. Clin Exp Pharmacol Physiol. 1978 Jan-Feb;5(1):75-80. [PubMed:639360 ]
  5. De Deyn PP, Marescau B, Cuykens JJ, Van Gorp L, Lowenthal A, De Potter WP: Guanidino compounds in serum and cerebrospinal fluid of non-dialyzed patients with renal insufficiency. Clin Chim Acta. 1987 Jul 30;167(1):81-8. [PubMed:3665089 ]
  6. Orita Y, Ando A, Tsubakihara Y, Mikami H, Kikuchi T, Nakata K, Abe H: Tissue and blood cell concentration of methylguanidine in rats and patients with chronic renal failure. Nephron. 1981;27(1):35-9. [PubMed:7219635 ]
  7. Hiraga Y, Kinoshita T: High-performance liquid chromatographic analysis of guanidino compounds using ninhydrin reagent. II. Guanidino compounds in blood of patients on haemodialysis therapy. J Chromatogr. 1985 Aug 9;342(2):269-75. [PubMed:4055949 ]
  8. Boppana VK, Rhodes GR, Brooks DP: Determination of methylguanidine in plasma and urine by high-performance liquid chromatography with fluorescence detection following postcolumn derivatization. Anal Biochem. 1990 Feb 1;184(2):213-8. [PubMed:2327567 ]
  9. Nohara Y, Hanai T, Suzuki J, Matsumoto G, Iinuma F, Kubo H, Kinoshita T, Watanabe M: Automatic system for the assay of guanidino compounds to assess uremic status. Biol Pharm Bull. 2000 Sep;23(9):1015-20. [PubMed:10993196 ]
  10. Fujitsuka N, Yokozawa T, Oura H, Akao T, Kobashi K, Ienaga K, Nakamura K: L-gulono-gamma-lactone oxidase is the enzyme responsible for the production of methylguanidine in the rat liver. Nephron. 1993;63(4):445-51. [PubMed:8459881 ]
  11. Giovannetti S, Barsotti G: Uremic intoxication. Nephron. 1975;14(2):123-33. [PubMed:1093053 ]
  12. Shainkin R, Berkenstadt Y, Giat Y, Berlyne GM: An automated technique for the analysis of plasma guanidino acids, and some findings in chronic renal disease. Clin Chim Acta. 1975 Apr 2;60(1):45-50. [PubMed:236102 ]