Arsenic (V) Oxide


Product # 1157
Name Arsenic (V) Oxide
Synonyms Arsenic acid anhydride, Diarsenic pentoxide, arsenic pentoxide
Formula As2O5
Purity 99.999%
CAS Number 1303-28-2
Molecular Weight 229.84
Color & Form White powder
Melting Point 315° C (dec.)
Specific Gravity 4.32 gm/ml
Solubility Soluble


25 gm $268.00
250 gm $2,280.00
  • For other quantities or purities not listed, please request a quotation. We can offer many items in bulk or custom packaging.
  • All pricing is subject to confirmation at the time the order is placed.


Transportation Information UN1559, Arsenic pentoxide, 6.1, II
Pictogram Pictogram: Acute  Pictogram: Health 
Signal Word Danger
Hazardous Statements

H300  Fatal if swallowed.

H331  Toxic if inhaled.

H350  May cause cancer.

Precautionary Phrases

P261  Avoid breathing dust/fume/gas/mist/vapours/spray.

P281  Use personal protective equipment as required.

P301+P310  IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P405  Store locked up.

Detailed Safety and Handling Information can be found on our Safety Data Sheet (SDS).

Featured Element: Gadolinium

Gadolinium is a brittle, silvery-white rare earth metal which is soft, ductile, and malleable.  Gadolinium was named for Finnish chemist Johan Gadolin.

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