I found the Kent Marine Iodine at Petco.com and also I went to the Kent Marine website for more info.
This is what is says about it's product:
{Contents:
de Ionized Water , potassium iodide, and iodine.
I figure if it says Lugol's the solution is the 5% like the one we take. It says there is nothing else added, and lists the things it doesn't have added to it, that other products may have added.