Tmic
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Record Information
Version1.0
Creation Date2009-03-06 18:58:29 UTC
Update Date2016-11-09 01:08:12 UTC
Accession NumberCHEM000254
Identification
Common NameMethylarsine
ClassSmall Molecule
DescriptionMethylarsine is an organic derivative of arsine. Arsenic is a chemical element that has the symbol As and atomic number 33. It is a poisonous metalloid that has many allotropic forms: yellow (molecular non-metallic) and several black and grey forms (metalloids) are a few that are seen. Three metalloidal forms of arsenic with different crystal structures are found free in nature (the minerals arsenopyrite and the much rarer arsenolamprite and pararsenolamprite), but it is more commonly found as a compound with other elements. (3, 9)
Contaminant Sources
  • IARC Carcinogens Group 3
  • T3DB toxins
Contaminant Type
  • Animal Toxin
  • Arsenic Compound
  • Natural Compound
  • Organic Compound
  • Organometallic
Chemical Structure
Thumb
SynonymsNot Available
Chemical FormulaCH5As
Average Molecular Mass91.972 g/mol
Monoisotopic Mass91.961 g/mol
CAS Registry Number593-52-2
IUPAC Namemethylarsane
Traditional Namemethylarsine
SMILESC[AsH2]
InChI IdentifierInChI=1S/CH5As/c1-2/h2H2,1H3
InChI KeyIDDBICIFODFKQO-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as trivalent organic arsenic compounds. These are organoarsenic compounds in which a carbon is linked to a trivalent arsenic atom.
KingdomOrganic compounds
Super ClassOrganometallic compounds
ClassOrganometalloid compounds
Sub ClassOrganoarsenic compounds
Direct ParentTrivalent organic arsenic compounds
Alternative Parents
Substituents
  • Trivalent organic arsenic compound
  • Organopnictogen compound
  • Hydrocarbon derivative
  • Arsine
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External DescriptorsNot Available
Biological Properties
StatusDetected and Not Quantified
OriginExogenous
Cellular Locations
  • Cytoplasm
  • Extracellular
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
StateLiquid
AppearanceNo data.
Experimental Properties
PropertyValue
Melting Point-143°C
Boiling PointNot Available
Solubility0.085 mg/mL at 20°C [YALKOWSKY,SH & DANNENFELSER,RM (1992)]
Predicted Properties
PropertyValueSource
Water Solubility122 g/LALOGPS
logP-0.8ALOGPS
logP0.34ChemAxon
logS0.12ALOGPS
Physiological Charge0ChemAxon
Hydrogen Acceptor Count0ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area0 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity7.15 m³·mol⁻¹ChemAxon
Polarizability5.42 ųChemAxon
Number of Rings0ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0006-9000000000-04f504fee16e0f4d4e8dView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0006-9000000000-04f504fee16e0f4d4e8dView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0006-9000000000-04f504fee16e0f4d4e8dView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0006-9000000000-258fadc13fb9507aee06View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0006-9000000000-258fadc13fb9507aee06View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-9000000000-258fadc13fb9507aee06View in MoNA
Toxicity Profile
Route of ExposureOral (4) ; inhalation (4); dermal (4)
Mechanism of ToxicityArsenic and its metabolites disrupt ATP production through several mechanisms. At the level of the citric acid cycle, arsenic inhibits pyruvate dehydrogenase and by competing with phosphate it uncouples oxidative phosphorylation, thus inhibiting energy-linked reduction of NAD+, mitochondrial respiration, and ATP synthesis. Hydrogen peroxide production is also increased, which might form reactive oxygen species and oxidative stress. Arsenic's carginogenicity is influenced by the arsenical binding of tubulin, which results in aneuploidy, polyploidy and mitotic arrests. The binding of other arsenic protein targets may also cause altered DNA repair enzyme activity, altered DNA methylation patterns and cell proliferation. (2, 1)
MetabolismArsenic is absorbed mainly by inhalation or ingestion, as to a lesser extent, dermal exposure. It is then distributed throughout the body, where it is reduced into arsenite if necessary, then methylated into monomethylarsenic (MMA) and dimethylarsenic acid (DMA) by arsenite methyltransferase. Arsenic and its metabolites are primarily excreted in the urine. Arsenic is known to induce the metal-binding protein metallothionein, which decreases the toxic effects of arsenic and other metals by binding them and making them biologically inactive, as well as acting as an antioxidant. (5)
Toxicity ValuesNot Available
Lethal DoseNot Available
Carcinogenicity (IARC Classification)3, not classifiable as to its carcinogenicity to humans. (8)
Uses/SourcesMethylarsine is found in marine biological systems. (9)
Minimum Risk LevelAcute Oral: 0.005 mg/kg/day (7) Chronic Oral: 0.0003 mg/kg/day (7) Chronic Inhalation: 0.01 mg/m3 (7)
Health EffectsArsenic poisoning can lead to death from multi-system organ failure, probably from necrotic cell death, not apoptosis. Arsenic is also a known carcinogen, esepcially in skin, liver, bladder and lung cancers. (2, 5)
SymptomsExposure to lower levels of arsenic can cause nausea and vomiting, decreased production of red and white blood cells, abnormal heart rhythm, damage to blood vessels, and a sensation of burn (2).
TreatmentArsenic poisoning can be treated by chelation therapy, using chelating agents such as dimercaprol, EDTA or DMSA. Charcoal tablets may also be used for less severe cases. In addition, maintaining a diet high in sulfur helps eliminate arsenic from the body. (5)
Concentrations
Not Available
DrugBank IDNot Available
HMDB IDNot Available
FooDB IDNot Available
Phenol Explorer IDNot Available
KNApSAcK IDNot Available
BiGG IDNot Available
BioCyc IDNot Available
METLIN IDNot Available
PDB IDNot Available
Wikipedia LinkNot Available
Chemspider IDNot Available
ChEBI IDNot Available
PubChem Compound ID79054
Kegg Compound IDNot Available
YMDB IDNot Available
ECMDB IDNot Available
References
Synthesis ReferenceNot Available
MSDSNot Available
General ReferencesNot Available