Which sn should i buy %98 or 99 ?

[IwishIwasAttractive]

does it matter

%98 100gram
%98 chem pure 1kg
%99 extra pure
%99.7

 

[Brick In The Wall]

Any of those will do you in. But if you have a choice why not go for the most pure?

 

[Kasper12]

99