How long can I keep sodium nitrite for?

[AsexualBarbieBoy]

I'm back.

Was active on this forum two years ago when I attempted suicide. I thought I had recovered and had been going to therapy and taking medication. Alas, I'm back. Quite bittersweet. I have some sodium nitrite leftover from my previous attempt. It's an airtight bottle and has been kept in a dark drawer. Will it still work? It's two years old.

 

[aminend]

Was ur previous attempt by SN?
If u opened its door I think thats better find another SN

 

[voyager]

Yeah, when you say "leftover" as in having opened it before? SN usually holds 2-3 years. Far longer if stored perfectly. You can blood or aquarium test it but it's hard to assess the exact purity as a layman. If in doubt try a new batch.