Selenium trioxide

Base Information

• Chemical Name: Selenium trioxide
• CAS No.: 13768-86-0
• Molecular Formula: O3Se
• Molecular Weight: 126.958
• European Community (EC) Number: 237-385-1
• ICSC Number: 0949
• UN Number: 3283
• DSSTox Substance ID: DTXSID50895004
• Nikkaji Number: J43.597J
• Wikipedia: Selenium trioxide,Selenium_trioxide
• Wikidata: Q6070
• Mol file: 13768-86-0.mol

Synonyms:Dioxide, Selenium;Monoxide, Selenium;Oxide, Selenium;Oxides, Selenium;selenium dioxide;Selenium Monoxide;selenium oxide;Selenium Oxides;selenium trioxide;Trioxide, Selenium

Chemical Property of Selenium trioxide

Chemical Property:

• Melting Point: 118°C
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• PSA: 51.21000
• Density: g/cm³
• LogP: -0.73720
• Water Solubility.: dissolves in H2O forming selenic acid [KIR82]
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 3
• Rotatable Bond Count: 0
• Exact Mass: 127.90127
• Heavy Atom Count: 4
• Complexity: 61.8
• Transport DOT Label: Poison

Purity/Quality:

99% ^*data from raw suppliers

SELENIUM TRIOXIDE 95.00% ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: O=[Se](=O)=O
• Inhalation Risk: Evaporation at 20 °C is negligible; a harmful concentration of airborne particles can, however, be reached quickly , especially if powdered.
• Effects of Short Term Exposure: The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema. The substance may cause effects on the eyes. This may result in allergic-type reaction of the eyelids (rose eye). Medical observation is indicated.
• Effects of Long Term Exposure: Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the respiratory tract, central nervous system, gastrointestinal tract and liver. This may result in nasal irritation, persistent garlic odour, stomach pain, nervousness and liver impairment.

Technology Process of Selenium trioxide

There total 18 articles about Selenium trioxide which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

selenium (7782-49-2) + ozone (10028-15-6) → selenium(IV) oxide (7446-08-4) + selenium trioxide (13768-86-0)

Guidance literature:

In further solvent(s); influence of a mixture of O2 and O3 on Se dissolved in SeOCl2;;

DOI:10.1021/ja01386a001 DOI:10.1021/ja01360a502

Reference yield:

selenium (7782-49-2) + oxygen (80937-33-3) → selenium(IV) oxide (7446-08-4) + selenium trioxide (13768-86-0)

Guidance literature:

In neat (no solvent); alternating current glow discharge at 4 mmHg O2-pressure, Al-electrodes, cooling with liquid air;; mixt. obtained;;

DOI:10.1021/ja01320a021

Reference yield:

selenium + oxygen (80937-33-3) → selenium(IV) oxide (7446-08-4) + selenium trioxide (13768-86-0)

Guidance literature:

In neat (no solvent); high frequency glow discharge at 15 to 20 mmHg and 20°C without electrodes;; mixt. obtained;;

upstream raw materials:

sulfur trioxide

selenium

selenic acid

selenium(IV) oxide

Downstream raw materials:

selenium(IV) oxide

selenic acid

Refernces

• 1、 Brassington, N. J.,Edwards, H. G. M.,Fawcett, V.. "The vibrational Raman spectra of selenium trioxide". . p. 451 - 454. Retrieved 1987.
• 2、 Smith, G. B. L.,Mehltretter, C. L.. "". . p. 3562 - 3562. Retrieved 1931.