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Re: Mercury - some values from the Web
From: Bill Noyce
Date: 2003 Jul 15, 14:43 -0400
From: Bill Noyce
Date: 2003 Jul 15, 14:43 -0400
A Google search for "mercury vapor pressure" turned up this in the second site found: Other materials may emit enough vapor to exceed the permissible exposure limit (PEL) for inhalation. This vapor pressure does not need to be large. For example, while the vapor pressure of mercury is quite low (0.00185 torr), this can easily exceed the PEL for mercury vapor. Always minimize your exposure to volatile chemicals and use proper protection such as fume hoods or respirators if their use can not be avoided or minimized. Another hit reports The vapor pressure of mercury is a sensitive function of temperature, the increase in concentration being in excess of 8% per degree Celsius. Yet another: A major advantage to using mercury in a manometer is the low vapor pressure of mercury, which is 0.0017 torr at 25 oC. This small vapor pressure can be ignored for all but very low pressure measurements. -- Bill