How to store N?

[miserabletires9]

Should it be stored in room temperature? Or refrigerator temperature?

The ppeh handbook says wrap it with aluminium foil and store it at refrigerator temperature.

But I see online websites that says room temperature....

 

[Dayrain]

The ppeh handbook says wrap it with aluminium foil and store it at refrigerator temperature.

Handbook says refrigerator is the optimum but a not must.