Re: lead hazard - changed

[Robert Myers <rmyers@inetone.net>]

Mygawd!  I just gotta proof-read more carefully!

At 07:20 AM 9/11/98 -0400, you wrote:
>At 09:41 AM 9/11/98 GMT, you wrote:
>>In message <707b6fce.35f83382@aol.com> MSV96@aol.com writes:
>>
>>> << MoS2 is molybdenun disulfide and is a graphite substitute in
lubricants.
>>> While I would not recommend eating it, getting a bit of moly containing
>grease
>>> on your hands shouldn't be particularly hazardous. >>
>>>
>>> Hope Bob's clarification sent to me privately takes care of some fears
>raised
>>> WRT lead hazards in grease. (Forwarded with his permission.)
>>
>>Lead is hazardous to a degree to adults, but its major threat is not to
>>adult brains - it's to _developing_ ones.  That's why lead levels in
>>children are monitored rather than lead levels in adults, and why the
>>German note on Audi's original equipment grease tubes specifically
>>mention children.
>
>Agreed, Phil.  Lead is a hazard.  Particularly for children.  However, the
>discussion was about moly, not lead.
>
>>If you _do_ come into contact with it in large quantities, I think the
>>medics recommend run-of-the-mill carbonate-based stomach powders -
>>there's some sort of precipitation effect.
>
>This is just wishful thinking in most cases of lead exposure.  Lead
>carbonate (PbCO3) which should (supposedly) be formed by this treatment is
>no less soluble than most other leads compounds.  The carbonate would have
>little effect.  There are, however, a few lead compounds which exhibit a
>"reasonable" solubility level.  These include lead nitrate [Pb(NO3)] and
>lead chloride [PbCl2].  Neither of these is would be in automotive use
>AFAIK.  
>
>Lead in old-fashioned leaded gasoline (petrol, Phil :-)) was present as
>tetraethyl lead in which four ethyl groups are attached to one lead atom
>via a rather covalent bong [Pb(Ch2-CH3)4].  It's purpose was to act as a
>ready source of free radicals (no, not Che Guevara) to help the main fuel
>start burning more readily and smoothely.  This relatively unstable
>compound is a definite hazard.  That's part of the reason that its use has
>been nearly ended.
>
>>But wash your hands well before going near your kids.
>
>Good idea most of the time anyway.  After all, our hands may not be clean
>but we know where they've been.  :-)
>
>
>___
>   Bob
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>*  Robert L. Myers  rmyers@inetone.net    Home 304-574-2372/1166      *
>*  Rt. 4, Box 57,  Fayetteville, WV 25840 USA      WV tag Q SHIP      *
>*  '95 S6  Cashmere Grey - der Wundercar                              *
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>
>
___
   Bob
***********************************************************************
*  Robert L. Myers  rmyers@inetone.net    Home 304-574-2372/1166      *
*  Rt. 4, Box 57,  Fayetteville, WV 25840 USA      WV tag Q SHIP      *
*  '95 S6  Cashmere Grey - der Wundercar                              *
*  '89 200tq chipped Pearl/grey suspension mods 127K miles - for sale *
***********************************************************************