Help Shelf life SN

[Victory]

Hello, I can not determine the shelf life of this SN. My supplier from Poland, said that it was made six months ago. But what is his shelf life, he did not specify. I'm in a panic! I am afraid that when my time comes, it will be unsuitable (
Sorry for my english, I'm using a translator

 

[Lethe]

If it stays sealed, it'll last years potentially.

 

[Victory]

If it stays sealed, it'll last years potentially.

I doubt it very much. Maybe fear tells me.

 

[Lethe]

I doubt it very much. Maybe fear tells me.

Why bother asking if you're going to deny the answer?

 

[Lutembëe]

I saw three years on this forum, don't know if that's legit.

 

[Dear Flabby]

You can test it.
Use the site search function to look for "Aquarium Testing kit for SN" or "Blood Test for SN"
These tests not only establish purity to some degree, but also whether the product will cause methemoglobinemia.

 

[Jerefeny]

I have exactly the same sn from the same source.
I did some empirical testing and after some time got nauseous.
I guess it's fine.

And even then, who would scam sn, its not even liquid or anything like that.
... either way as long it's in good conductions it will last as long you need.