Substance profile
Arsenic pentoxide
Arsenic pentoxide is a white amorphous powder.
01 · Identification
What Arsenic pentoxide is
Arsenic pentoxide is a white amorphous powder. It boils at 160 °C, melts at 315 °C.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
Other names for Arsenic pentoxide
- diarsenic pentaoxide
- arsenic oxide
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H331 | Toxic if inhaled. |
| H301 | Toxic if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P260, P270, P271, P273, P280, P301, P304, P308, P310, P313, P330, P391, P501
This page lists only the codes assigned to Arsenic pentoxide. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
03 · Physical and chemical properties
Arsenic pentoxide properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 160 °C (320 °F) | Hemihydrate | HSDB |
| Melting point | 315 °C (599 °F) | HSDB | |
| Density | 4.32 g/cm³ | HSDB | |
| 4.3 g/cm³ | ICSC | ||
| Solubility | Freely soluble in water or alcohol | HSDB | |
| Very soluble in ethanol | HSDB | ||
| In water, 65.8 g/100 g at 20 °C | at 20 °C | HSDB | |
| Flash point | Not flammable (EPA, 1998) | CAMEO | |
| Lower explosive limit (LEL) | Containers may explode when heated | HSDB | |
| Corrosivity | Corrosive to metals in the presence of moisture. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Arsenic pentoxide
Storage conditions
Store in tightly-closed containers in a cool, well-ventilated area away from metals, acids and other incompatible materials.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
With bromine pentafluoride: Contact with arsenic pentoxide at ambient or slightly elevated temperatures is violent, ignition often occurring.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Arsenic pentoxide in the storage compatibility matrix →
Safety Data Sheet
Getting an SDS for Arsenic pentoxide
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Arsenic pentoxide issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
Nearby
Substances next to Arsenic pentoxide
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