"Allen" wrote in message
news:39K8d.640434$gE.284481@pd7tw3no...
Are sodium metabisulphite and potassium metabisulphite interchangeable?
Any
descriptions of what these chemicals do seem to say the same thing but,
most
recipes seem to call for pot meta. Is one better than the other or are
they
used for different purposes?

The sodium version is fine for general sanitizing, but for use in the actual
wine it's better to stick to the potassium form because the excess potassium
is normal in wine, whereas excess sodium isn't.

Tom S