I use a sodium metabisulphite solution (50 g / 4 l) to sanitize my carboys,
racking tube, etc and I find that I react very strongly - sneezing,
heaviness in chest, etc - to it. Is this an allergic reaction? how toxic is
this stuff ? My room is not very well ventilated but all the same I am
surprised at how it affects me. Anyone else have any experiences like this
or suggestions to offer?

Gabriel

"Gabriel" > wrote in message
...
>
> I use a sodium metabisulphite solution (50 g / 4 l) to sanitize my
carboys,
> racking tube, etc and I find that I react very strongly - sneezing,
> heaviness in chest, etc - to it. Is this an allergic reaction? how toxic
is
> this stuff ? My room is not very well ventilated but all the same I am
> surprised at how it affects me. Anyone else have any experiences like this
> or suggestions to offer?

Sulfite solution affects everyone in that way, but some to a greater degree.
The stuff releases SO2 gas, which in small doses is an irritant but in
larger doses can be considered poisonous. Use it with adequate ventilation
or wear a mask made for the purpose. BTW, don't leave the solution on your
hands for an extended time because it's rather alkaline and isn't good for
your skin.

Tom S

"Gabriel" > wrote in message
...
>
> I use a sodium metabisulphite solution (50 g / 4 l) to sanitize my
carboys,
> racking tube, etc and I find that I react very strongly - sneezing,
> heaviness in chest, etc - to it. Is this an allergic reaction? how toxic
is
> this stuff ? My room is not very well ventilated but all the same I am
> surprised at how it affects me. Anyone else have any experiences like this
> or suggestions to offer?

Sulfite solution affects everyone in that way, but some to a greater degree.
The stuff releases SO2 gas, which in small doses is an irritant but in
larger doses can be considered poisonous. Use it with adequate ventilation
or wear a mask made for the purpose. BTW, don't leave the solution on your
hands for an extended time because it's rather alkaline and isn't good for
your skin.

Tom S