I ordered 1 kg of sn from them, the source that ends with o. What quantity did you get? Do the quantities matter, I mean would a package of 500 g of sn be of different purity than 1 kg or even more? I saw on their website the 500 g as well as 1 kg sn have at least 98% purity but I'm not sure if the one I ordered really is pure like they say on their website, I didn't test its purity yet. If they specify the purity there then it should be pure right, why would they lie about its purity? What type of test did you do? Did you use nitrite test kits or aquarium strips?
i ended up ordering from B (ending with O) aswell although my order got refunded. (gonna try again)
But im pretty sure that their SN is the same as the BM? It says so on their website, and the containers from both sources are identical.
I have already emailed BM and their SN is certified with the "chemical substance approval".
i also tried ordering 1kg from source ending with an O, and no i dont think the quantities matter.
it will be the same product and purity, just a different volume.
u can also do a blood test in the mean time if youre really worried about the purity.