BVStaples spake thus:

Second, once used, what's the proper disposal method? I have friends
who pour everything down the drain, and then those who recyle
everything.

Sorry I can't answer your other questions, but on this one, keep in mind
that among other uses, sodium sulfite is used for preparing food (dried
fruit, for example), so it's very safe to dispose of it down the drain.


--
Any system of knowledge that is capable of listing films in order
of use of the word "****" is incapable of writing a good summary
and analysis of the Philippine-American War. And vice-versa.
This is an inviolable rule.

- Matthew White, referring to Wikipedia on his WikiWatch site
(http://users.erols.com/mwhite28/wikiwoo.htm)