Does SN expire?

[MariV]

Yes, keep it away from moisture, and put in an air tight container.

its in a plastic bottle so it should be fine i guess.i was just too curious to see it.and many here say if u open it ure screwed.i dont see the logic, as there is already air in the bottle. thx rosey

 

[LastFlowers]

This is correct. SN is very stable despite caking or yellowing. It is best to keep it away from moisture snd in an air tight container.

I just noticed that the container mine came in is seemingly half filled with air, because the SN doesn't fill the container/bottle all the way. Is this a problem?