Quoting Andrew Thrift to All re "Sulphate/Sulphite"
 AT> Hi Guys, I have a question about a chemichal I came accross in a
 AT> Kodak book about developers, it listed a chemichal called Sodium
 AT> Bisulphite which I have never heard of, I was wondering is this the
 AT> same as Sodium Bisulphate? Thanks for your help.
No, bisulphite is a reducing agent or anti-oxidant which means that if it 
does undergo a reaction it becomes itself oxidised to bisulphate.
Sodium Bisulphite is commonly used as the antioxidant in meats (keeps it red 
instead of grey) and in wines (to minimise conversion of alcohol to vinegar) 
and reacts to Sodium Bisulphate in carrying out this function.
Regards,
John Ascenzo
... Everything I know is basic; everything else is complex.
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