Talk:Tungsten(VI) fluoride

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Correction: Tungsten hexafluoride is not the densest known gas, that prize goes to uranium hexafluoride. Physchim62 15:54, 24 May 2005 (UTC)

Uranium hexafluoride is a volatile solid; it sublimes at 56.5 ˚C. So at room temperature, tungsten hexafluoride is still the densest "gas". The solid UF₆ would almost certainly exist in equilibrium with some vapor, so depends on what you consider gas. --71.227.190.111 03:54, 31 July 2006 (UTC)

[edit] Corrections

Tungsten hex is a water white colorless liquid. If it is contaminated with Cr then it is yellow to orangish red depending on how much Cr and which Cr speicies is contaminating it. It will form HF on contact with water and it will cause damage, not may. 24.229.244.111 17:10, 11 February 2006 (UTC)

[edit] Comments

• Well, I guess that the prize for the most dense gas could become legalistic, depending on conditions and the degree to which one wants to discuss transient species and plasmas, but by most normal perspectives UF6 is probably it. I dont know if perfluorides are known for the still heavier elements such the congener of W.
• Back to the WF6 report. It is claimed to be "odorless". Thus, the rate of hydrolysis must be quite slow, because I would expect it to smell like HF.
• Also, I propose to replace the tentative "may"s in the following quote, fix the awkward which ( implying that water can penetrate...), and remove the claim that WF6 can damage bone (seems silly)

"WF6 may form hydrofluoric acid (HF) on contact with water, which can penetrate the skin and cause damage to the subdermal tissues and bone. Inhalation may cause respiratory tract burns and can be toxic. This compound is a lachrymator which causes tearing and irritation of the eyes. Contact may cause burns to the eyes, skin and mucous membranes." One question is whether WF6 poses dangers beyond being an in situ source of con HF. Smokefoot 17:44, 11 February 2006 (UTC) I have physically seen WF6 react instantly with the moisture in the air to form a smokey white cloud. As for its odor, I am glad I don't know what it smells like! (24.229.244.111 02:54, 15 February 2006 (UTC))