SN drink getting cold?!

[MoveAlong]

I had posted before, asking if it's normal for the SN drink to turn cold and I came to the conclusion that I should just get a new batch.
So I bought a new batch of HM 417. Lo and behold, immediately right after opening up the seal to make the first drink it turned cold!
Has anyone witnessed this or can perhaps shed some light?
I appreciate the input and wish everyone peace.

 

[hʚll]

bump

 

[Bullit]

Greenie,care to weigh in?

 

[Greenberg]

There was a previous thread on this topic. I can only confirm that Sodium Nitrate when dissolved in water is endothermic; however, in terms of SN, I cannot confirm the same. Sorry...

 

[LaminarFlow]

There was a previous thread on this topic. I can only confirm that Sodium Nitrate when dissolved in water is endothermic; however, in terms of SN, I cannot confirm the same. Sorry...

Dissolution of SN in water is also endothermic

http://www.actforlibraries.org/how-to-safely-create-an-endothermic-reaction/