Skip to main content
Jingsj
.mol.sdf

Selenium dioxide

Also known as: EINECS 231-957-4, MFCD00134090, Oxoselane oxide, SELENIOUS ANHYDRIDE, SELENIUM AA SINGLE ELEMENT STANDARD, SELENIUM AA STANDARD, SELENIUM AA/ICP CALIBRATION/CHECK STANDARD, SELENIUM ATOMIC ABSORPTION SINGLE ELEMENT STANDARD, SELENIUM ATOMIC ABSORPTION STANDARD, SELENIUM, AAS, Selane, oxo-, oxide, Selenious acid anhydride, Selenium(IV) oxide

Selenium dioxide (CAS 7446-08-4) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula O2Se and a molecular weight of 110.959 g/mol. Key properties include a melting point of 315ºC, a boiling point of 684.9ºC(lit.), a density of 3.95 and a flash point of 315ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H331 — Toxic if inhaled and H373 — May cause damage to organs through prolonged exposure. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
7446-08-4
Jingsj CID
J-1014594-4
Molecular Formula
O2Se
Molecular Weight
110.959 g/mol
Category
Inorganic Chemicals
Last updated
8/21/2026
Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point315ºC
Boiling Point684.9ºC(lit.)
Density3.95
Flash Point315ºC
Exact Mass111.906349
PSA34.14000
Vapor Pressure1 mm Hg ( 157 °C)
Additional PropertyH2O: soluble | 38.4 g/100 mL (14 ºC)

GHS Safety & Compliance

Acute Toxicity / Health Hazard / Environmental HazardSignal word: Danger
  • H301 — Toxic if swallowed
  • H331 — Toxic if inhaled
  • H373 — May cause damage to organs through prolonged exposure
  • H410 — Very toxic to aquatic life with long lasting effects

Customs & Trade Information

HS Code2811290090

Frequently Asked Questions

What is the CAS number of Selenium dioxide?

The CAS number of Selenium dioxide is 7446-08-4.

What are the molecular formula and molecular weight of Selenium dioxide?

Selenium dioxide has molecular formula O2Se and molecular weight 110.959 g/mol.

Is Selenium dioxide hazardous?

Selenium dioxide has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H331 — Toxic if inhaled; H373 — May cause damage to organs through prolonged exposure.

What are the upstream and downstream products of Selenium dioxide?

For Selenium dioxide, Upstream Products: Selenic acid, Selenium, ozone; Downstream Products: 2-(4-methoxyphenyl)-2-oxoacetaldehyde, Dehydroascorbic acid, Cyclobutanecarboxylic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Selenium dioxide (CAS 7446-08-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1014594-4 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.