Help SN extra pure without any purity label

[toplaygames202212]

Have found a SN on a website which says extra pure but does not mention the purity %. So what does this mean? How much purity does it have?

 

[Plato'sCaveDweller]

I would not buy it if it doesn't give a purity. Better safe than sorry, especially with something as serious and consequential as CTB. If i remember correctly, there's a website that has tricked people here into thinking they're getting pure SN, but it's just curing salt with like 5% SN in it. I don't recall the name, but that may be the site you're viewing.