Help SN longevity?

[Innereye]

Been replanning my CTB around some potential medical solutions to my health. However, a few weeks ago I opened my SN packet (that I ordered around 4 years ago) And I dont know how long it's potency remains or if its already unusable.

Would It be able to last another 3-6 months? Or do I have to source more?

Thanks guys I hope your day's are going as well as possible!

 

[voyager]

I don't think that tiny bit of air harms it per se as long as you repacked it airtight, but the humidity slipping into the container might, but by how much if any? Otoh, under normal conditions where SN is used the container is regularly opened and it remains potent for years. But it's the 95%+ we have to keep in mind, so I'd really love to have a definite answer on this as well. Well wishes to you too.

PS: If you did have an accessable potent source available I'd always go with that instead.