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Discussion Starter · #1 ·
Just got a new ferts in today and the Potassium Sulfate is not the same color as what I had previously. Prior batch was a light pinkish color. This bag is pretty much white - or perhaps a slightly beige color (relative to KNO3) with a few (very few) black specks (like some fine pepper). Also got new KN03 in the same order - It is clearly different from the bag labeled K2S04 - fine white powder as I would expect.

Does this sound right? If it isn't "pink" or "salmon" color can it be K2S04?

Thanks for any help,
Jay Reeves
 

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The new K2SO4 you got is just different in grade than the pink stuff. You'll see the same variance in color with KCl. For what it's worth, your new batch sounds identical to the K2SO4 I have. The peppery looking stuff is an (harmless) insoluble impurity, so don't be surprised if you notice it on the bottom of the bottle after mixing up a solution.
 
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