Method How long does SN last mixed?

[Blackroom_57]

Assuming 25 grams is mixed in 50ml of water in a sealed water bottle, how long could you expect it to last? I'm no chemist but I cant see any reason why it would start to degrade or lose its potency.

 

[madebrief]

Someone commented that it was still strong after 3 months when testing it again I think (maybe 6 but can't remember)