Selenium hexafluoride

Chemical Name Synoityms Chemical Fonnula CAS number Molecular Weight Boiling point Melting point Vapor pressure (20°C) Solubility in water DOT classification DOT label UN Number CGA Connection Exposure limits Target effects 

Nasal irritation, nausea, vomiting, dizziness result from exposure. Clnonic exposure may result in kidney and liver damage. Profound hypocalcemia and hypomagnesemia occur following inhalation or skin contact. 

Upon contact with water may release HF. Avoid contact with strong acids or reducing materials such as hydrocarbons. 

Self contained breathing apparatus in positive pressure mode. Gloves and splash proof goggles with face shield should be worn. 

Ventilate area, keep persons away. Re move leak to exhausted enclosure direct toward suitable adsorbent or scrabber. 

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Selenium hexafluoride, SeF m.p. — 39°C, sublimes —47°C. Formed (with Sc2Fio) from Se and F2- Chemically fairly inert. 

Both selenium hexafluoride and tellurium hexafluoride are more reactive than sulphur hexafluoride. Tellurium hexafluoride is slowly hydrolysed by water to telluric) VI) acid and on heating it decomposes to fluorine and the tetrafluoride. 

Seiko Chemical Co., Ltd, 188 Selenium and Selenium Compounds, 115 Selenium dioxide, 116 Selenium hexafluoride, 116 Selenium oxychloride, 116 Selenium sulfides, 116... 

Propyleneimine Selenium hexafluoride Stibine (antimony hydride)... 

Selenium-containing donors, synthesis and manufacture of, 22 212 Selenium dichloride, 22 75t Selenium diethyldithiocarbamate, 22 73t Selenium dioxide, 22 73t, 75t, 88 toxicify of, 22 95 Selenium disulfide, 22 73t Selenium hexafluoride, 22 75t, 87 toxicify of, 22 96 Selenium hypofluorite, 22 75t Selenium iodides, 22 87 Selenium monobromide, 22 75t, 88 Selenium monochloride, 22 75t, 87 in selenium recovery, 22 85 Selenium monoxide, 22 88 Selenium oxidation, selenium recovery via, 22 81-83... 

SELENIUM TETRACHLORIDE SELENIUM HEXAFLUORIDE SELENIUM OXYCHLORIDE SELENIUM DIOXIDE SILICON... 

SeF6 SELENIUM HEXAFLUORIDE -13.7376 -9.6701E+02 1.0083E+01 -1.4935E-02 9.6551E... 

See separate entries on selenium hexafluoride and hydrogen selenide.)... 

Toxicology. Selenium hexafluoride is a severe pulmonary irritant in animals heavy exposure is expected to cause the same effect in humans. 

There are no reports of human exposure to selenium hexafluoride. 

The 2003 ACGIH time-weighted average-threshold limit value (TWA-TLV) for selenium hexafluoride is 0.05ppm (0.16mg/m ). 

Selenium hexafluoride is prepared by passing fluorine gas over finely divided selenium in a copper vessel ... 

Elemental composition Se 40.92%, F59.08%. The gas may be dissolved in nitric acid and dilute hydrofluoric acid and the solution appropriately diluted and analyzed for selenium (see Selenium). The hexafluoride may be decomposed with ammonia at 200°C and product selenium analyzed by AA, and gaseous products nitrogen and hydrogen fluoride diluted with helium and analyzed by GC-TCD or GC/MS. Alternatively, selenium hexafluoride diluted with helium is introduced onto the GC injector port and analyzed by GC/MS. Molecular ions have masses 194, 192, 196, and 190. 

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