The product I received matches the Wikipedia article; the labeling on the bag is 'potassium citrate', and the nutritional breakdown per 100 grams matches what the Wikipedia article claims (eg. the bag claims 36.2g of potassium per 100g of powder while WP says "Pure potassium citrate contains 38.28% potassium.", which makes sense if the formula is C6H5K3O7 - as compared to KI). I haven't noticed any of the side-effects which are listed for potassium iodide despite taking what would by now have been a serious dose of potassium iodide. Finally, that description is identical to their informational page for potassium iodide crystals. So my guess is that it's some sort of copy and paste error, but definitely worth me emailing them to ask...