Help How long can SN last for?

[LikeAPendulum]

I've heard that SN will turn bad if left to oxidize for too long. What's the shelf life for SN? Mine came in a bottle, and im afraid that it's already gone past it's shelf life.

 

[Bastet]

If you have kept it closed in its original container without alot of humidity around (not in a shower lol), it is almost certainly still good.

Most resources say its stable for 3 years, but most certainly they just haven't tested it further bc it costs lots of money to test it.
And even if it would degrade after say 6 years, the degradation is a continuos process, so only a small ammount would decay for example in the following year.

Sn is more stable than some here believe, but I totally get the paranoia.