Help Is it okay to store DMC SN in the package it came in?

[timorousTruant]

My SN arrived back in November, and I've just kept it in the original package all this time. It's in some sort of silvery-plastic bag, seemingly vacuum-sealed I think. I haven't opened it yet.

Is this alright for maintaining its purity, or should I transfer it to another container? If so, what would you recommend?

 

[Bert2233]

Good question

 

[Defenestrator]

Sealed and unopened it's probably fine.
If you're storing it long term you may want to move it to another container but I don't think that's necessary until you open the packet.

 

[CeeR]

What is DMC? How do I find it. I ordered from a site recommended in the PPH. It's abbreviated "S-D-T". Are they legit?