Re: MSDS sheets and the Curse of Schiff
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From: | "J. A. Kiernan" <jkiernan@julian.uwo.ca> (by way of histonet) |
To: | histonet <histonet@magicnet.net> |
Reply-To: | |
Content-Type: | text/plain; charset="us-ascii" |
On Tue, 6 Oct 1998, Alex Brown wrote:
> I've been reviewing our COSHH Risk Assessments for a forthcoming
> CPA visit and have discovered we don't have one for Schiff's reagent .
> We buy it ready made from BDH and the bottle doesn't have any hazard or
> warning symbols on it. I'm finding it hard to believe that Schiff's
> reagent isn't hazardous to some degree, so would appreciate any
> comments.
When I buy a bottle of ready-made Schiff, it comes with several
pages of MSDS sheets: for basic fuchsine, hydrochloric acid and
sodium metabisulphite. These are completely consumed when
the reagent is made, so it doesn't actually contain any of these
substances (except possibly a slight excess of dilute hydrochloric
acid). There is no mention of the sulphur dioxide fumes, and not
even a hint about the greatest hazard, which is the deposition
of purple stains on everone and everything accidentally touched
by the colourless liquid.
John Kiernan
London, Canada.
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