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Record Information
Creation Date2009-06-16 18:46:48 UTC
Update Date2016-11-09 01:08:21 UTC
Accession NumberCHEM000749
Common NameAntimony pentoxide
ClassSmall Molecule
DescriptionAntimony pentoxide (Sb2O5) is a chemical compound of antimony and oxygen. It always occurs in hydrated form, Sb2O5·nH2O. Antimony is a metallic element with the chemical symbol Sb and atomic number 51. Small amounts of antimony are found in the earth's crust. (8, 7)
Contaminant Sources
  • HPV EPA Chemicals
  • T3DB toxins
Contaminant Type
  • Antimony Compound
  • Food Toxin
  • Inorganic Compound
  • Metalloid
  • Pollutant
  • Synthetic Compound
Chemical Structure
Pentahydric acid distibaneGenerator
Chemical FormulaH16O5Sb2
Average Molecular Mass339.643 g/mol
Monoisotopic Mass337.907 g/mol
CAS Registry Number1314-60-9
IUPAC Namepentahydrate distibane
Traditional Namepentahydrate distibane
InChI IdentifierInChI=1S/5H2O.2Sb.6H/h5*1H2;;;;;;;;
Chemical Taxonomy
Description belongs to the class of inorganic compounds known as metalloid oxides. These are inorganic compounds containing an oxygen atom of an oxidation state of -2, in which the heaviest atom bonded to the oxygen is a metalloid.
KingdomInorganic compounds
Super ClassMixed metal/non-metal compounds
ClassMetalloid organides
Sub ClassMetalloid oxides
Direct ParentMetalloid oxides
Alternative Parents
  • Metalloid oxide
  • Inorganic antimony salt
  • Inorganic oxide
  • Inorganic salt
  • Inorganic metalloid salt
Molecular FrameworkNot Available
External DescriptorsNot Available
Biological Properties
StatusDetected and Not Quantified
Cellular Locations
  • Cytoplasm
  • Extracellular
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
AppearanceWhite powder.
Experimental Properties
Melting Point380°C
Boiling PointNot Available
SolubilityNot Available
Predicted Properties
pKa (Strongest Acidic)15.7ChemAxon
pKa (Strongest Basic)-1.8ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area25.3 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity3.7 m³·mol⁻¹ChemAxon
Polarizability1.51 ųChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0udi-0009000000-fbfa9e1097750a83bcfbView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0udi-0009000000-fbfa9e1097750a83bcfbView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0udi-0009000000-fbfa9e1097750a83bcfbView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0002-0009000000-cdc134b2633e7a58465cView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0002-0009000000-cdc134b2633e7a58465cView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0002-0009000000-cdc134b2633e7a58465cView in MoNA
Toxicity Profile
Route of ExposureInhalation (7) ; oral (7) ; dermal (7)
Mechanism of ToxicityThe inhalation data suggest that the myocardium is a target of antimony toxicity. It is possible that antimony affects circulating glucose by interfering with enzymes of the glycogenolysis and gluconeogenesis pathways. The mechanism of action of antimony remains unclear. However, some studies suggest that antimony combines with sulfhydryl groups including those in several enzymes important for tissue respiration. The antidotal action of BAL depends on its ability to prevent or break the union between antimony and vital enzymes. Moreover, the The cause of death is believed to be essentially the same as that in acute arsenic poisoning. Antimony pentoxide might enhance the rate of heme degradation in liver and kidney. (2, 3, 7, 1)
MetabolismAntimony is widely distributed throughout the body. The hair and skin contain the highest levels of antimony. The adrenal glands, lung, large intestine, trachea, cerebellum, and kidneys also contain relatively high levels of antimony. Blood is the main vehicle for the transport of absorbed antimony to various tissue compartments of the body. Antimony is a metal and, therefore, does not undergo catabolism. Antimony can covalently interact with sulfhydryl groups and phosphate, as well as numerous reversible binding interactions with endogenous ligands (e.g., proteins). It is not known if these interactions are toxicologically significant. Antimony is excreted via the urine and feces. Some of the fecal antimony may represent unabsorbed antimony that is cleared from the lung via mucociliary action into the esophagus to the gastrointestinal tract. (7)
Toxicity ValuesLD50: 4000 mg/kg (Oral, Rat) (8) LD50: 978 mg/kg (Oral, Mice) (8)
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity (not listed by IARC). (6)
Uses/SourcesBreathing air, drinking water, and eating foods that contain antimony. Exposure can also occur through dermal or skin contact (7).
Minimum Risk LevelNot Available
Health EffectsDermal exposure to antimony can cause antimony spots (papules and pustules around sweat and sebaceous glands). Antimony poisoning can also lead to pneumoconiosis. Alterations in pulmonary function and other effects including chronic bronchitis, chronic emphysema, inactive tuberculosis, pleural adhesions, and irritation can result from inhalation of antimony. Increased blood pressure can also result from antimony poisoning. Myocardial depression, vasodilation and fluid loss may cause shock with hypotension, electrolyte disturbances and acute renal failure. Cerebral oedema, coma, convulsions, and death are possible. (7)
SymptomsAbdominal pain, vomiting, diarrhea can result from inhalation of antimony. Dyspnea, headache, vomiting,cough, conjunctivitis, and bloody purulent discharge from nose can result from inhalation exposure. Skin or eye contact can cause pain and redness of the exposed surface. (5, 7)
TreatmentFollowing oral exposure to antimony, administer charcoal as a slurry (240 mL water/30 g charcoal). Following inhalation exposure, move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with inhaled beta2 agonist and oral or parenteral corticosteroids. In case of eye exposure, irrigate exposed eyes with copious amounts of room temperature water for at least 15 minutes. Following dermal exposure, remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician may need to examine the area if irritation or pain persists. (4)
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KNApSAcK IDNot Available
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BioCyc IDNot Available
METLIN IDNot Available
PDB IDNot Available
Wikipedia LinkNot Available
Chemspider IDNot Available
ChEBI IDNot Available
PubChem Compound IDNot Available
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Synthesis ReferenceNot Available
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General ReferencesNot Available