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- Newsgroups: sci.materials
- Path: sparky!uunet!munnari.oz.au!mel.dit.csiro.au!dmp.csiro.au!lachlan
- From: lachlan@dmp.csiro.au (Lachlan Cranswick)
- Subject: Re: Uses of Be - toxicity
- Message-ID: <1992Oct13.133204.2281@dmp.csiro.au>
- Organization: CSIRO Division of Mineral Products, Melbourne, AUSTRALIA
- References: <1992Oct7.222241.148720@ns1.cc.lehigh.edu> <1992Oct10.130849.1024@dmp.csiro.au> <WEBER-121092064724@129.197.66.249>
- Date: Tue, 13 Oct 1992 13:32:04 GMT
- Lines: 90
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- >> "Death may result from short exposure to incredibly low concentrations.
- >> Acute: pneumontis may result from single exposure to berylium
- >> and accasionally is fatal. Chronic: pulmonary granulomatous
- >> disease may appear in 3 months to 6 years, often after short
- >> exposure to low concentrations. Uncertainty as to complete
- >> recovery. Death rate about 25%. Rewiew: "Berylium
- >> and Berylliosis" by J. Schubert in Sci. American 199,
- >> no 2, pp 27-33 (Aug. 1958)"
- >> --
- >Look at the date of that article! No one has died of berylliosis in 30
- >YEARS!!!
- >There have been 2 (yes, count them, 2) cases of berylliosis in the last 20
- >years. The toxicity of beryllium is ONLY related to powder form. Contact in
- >any other pure form is absolutely harmless. Back in the 50's when beryllium
- >was becoming popular, some workers contracted berylliosis. Only a small
- >fraction of people, about 3%, can even get berylliosis at any exposure
- >level. Most of us are totally immune to berylliosis. There was an
- >immediate panic, evidenced by your quote. Research quickly determined that
- >dry machining and ore crushing operations caused the dust which caused
- >berylliosis.
-
- >Here at Lockheed we constantly use beryllium, it has many properties
- >unmatched by any other material known to man, and it is extremely harmless
- >when proper precautions are followed.
-
- >You could propably find a 50's article which shows the benefit of cigarette
- >smoking. I suggest to look into more recent work in the area.
-
- >kevin weber
-
- OK, I admit it, my personal Merck Index is a bit old (1960) but
- those health warnings are still current and
- "the beryllium panic" is still going on down here to the
- extent that the supplier of our X-ray diffraction tubes
- (our source of beryllium) considers it an obligation
- to safely dispose of the tubes for us free of charge.
- In this part of the world, beryllium is a chief nasty
- that you don't want to use unless you have to.
- One easy way to get you arse kicked here is to risk your own
- health and/or of others - even if the health risk to some
- people seems pretty obscure.
-
- Just a small query :-
- What handling procedures make handling berylium "extremely harmless"?
- (In theory CFCs can be contained in such a way that they don't
- affect the OZONE layer, but why is there the rush for alternatives?)
- I am very carefull (almost paranoid) with beryllium metal
- because (1) it is considered to be highly toxic
- and (2) it is so fragile that it does not take too
- much effort to break the beryllium window
- - wrecking a $4000 X-ray Diffraction tube
- and spraying the lab with toxic beryllium splinters.
-
- The worst horror story I have heard about beryllium
- (all hearsay) is about a guy who was trying to
- sythesize a beryllium mineral by putting the starting
- material in an Iron bomb, then into an furnace. Being in a rush to
- cool the bomb down (claiming afterwards full knowledge of the possible
- consequences) he threw the still hot bomb into a bucket of cold
- water. This promptly blew up spraying beryllium all over the lab.
- I don't know what had to be done to get the lab
- back in a safe-usable condition. (Mercury spills are cleaned
- up by adding elemental Sulphur over the area, what imobilizes
- beryllium?)
-
- Given the above attitude on beryllium, you will
- probably find it typically paranoid that our radiation lab
- considers anything above background to be a
- leak that has to be fixed. It can be
- argued that compared to the health risks of pollution,
- passive smoking, junk food, coca-cola etc,
- these potential hazards are not much of a
- health risk. This could be correct, but it is much
- nicer to work in an lab environment where the emphasis
- is on more safety rather than less safety.
-
- The original question was why Beryllium isn't used more
- widely (in mainstream uses). My opinion (still)
- is that Beryllium is so toxic people would
- prefer to use alternatives rather than risk its harmful effects.
-
-
- --
- Lachlan Cranswick - CSIRO _--_|\ lachlan@dmp.CSIRO.AU
- Division of Mineral Products / \ tel +61 3 647 0367
- PO Box 124, Port Melbourne 3207 \_.--._/ fax +61 3 646 3223
- AUSTRALIA v
-