Arsenic (V) Oxide

Synonym: Arsenic pentoxide, Arsenic acid anhydride, Diarsenic pentoxide
CAS Number 1303-28-2 | MDL Number MFCD00003434 | EC Number 215-116-9

Arsenic (V) Oxide Chemical Structure

Product CodeAS3282
CAS Number1303-28-2
Assay (purity)99.999%
Purity methodby elemental analysis
Molecular weight229.84
Appearancewhite powder
Melting point315C
Molecular formulaAs2O5
Linear formulaAs2O5

Ereztech manufactures and sells this product in small and bulk volumes. Glass ampules, bottles or metal ampules or bubblers are available for packaging. For additional analytical information or details about purchasing Arsenic (V) Oxide contact us at

Safety information

Signal wordDANGER
Hazard statementsH300, H331, H350
Precautionary statementsP201, P202, P261, P264, P270, P271, P281, P301+P310, P304+P340, P308+P313, P311, P321, P330, P403+P233, P405, P501
Transport descriptionARSENIC PENTOXIDE
Hazardous class6.1
Packing groupII
In TSCA registryYes

Certificates of analysis (CoA)

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External identifiers for Arsenic pentoxide

Pubchem CID14771
IUPAC Namearsenic(3+); oxygen(2-)
InchI IdentifierInChI=1S/As2O5/c3-1(4)7-2(5)6

Ereztech synthesizes and sells additional AS-compounds.

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