wolfsc at ibms.sinica.edu.tw
Thu Jul 19 21:02:57 EST 2001
> One of my "general rules" is this: if a substance reacts with
> nucleic acids or proteins - give it some respect. When in doubt
> or ignorant of something, be cautious - not careless.
this is very good rule of thumb
> If a safety person makes a recommendation, give it some heed.
The problem with safety rules however is, that their basis is
not safety issues in the first instance but that nobody wants to
take responsibility. I wouldn't be astouned when suddenly
even deionized water gets some orange label.
Recently, I have disovered a dead head sign (poison) on a
bottle with acetic acid (irritant and flammable is what I would
expect to be there). The consequence is, that a newbie
without a lot of practical experience will loose any sense for
the real danger of chemicals. Where's the difference to the
really toxic stuff now?
Of couse I would have a sip of conc HOAc or have a bath in it,
but I wouldn't doubt that my body easily will detoxify an
accidental breath of it (what I would doubt in the case of EtBr).
It seems to me there is a lot of hystery on lab hazards:
micrograms of EtBr are detoxified (??) with grams of
permanganate first using lots of HCl for acidification and the
lots of NaOH for neutralization, potentiating the waste by
magnitudes. But you have fulfilled the lab rule / satisfied the
safety officer / peace of mind (!?)
One could continue almost endlessly.
[tiss mezzage wahs broduceRd using TYPO GENERATOR zoffwer]
Dr. Wolfgang Schechinger
Lab N233 (c/o Dr. Steve Roffler)
Institute of Biomedical Sciences
128 Yen-Chio Yuan Rd. Sec.2
e mail wolfsc at ibms dot sinica dot edu dot tw
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