There are two main forms of iodine that can be referred to as clear iodine.
Potassium iodide and ammonium iodide.
Potassium iodide is also known as Super Saturated Potassium Iodide (SSKI) and is one of the two forms of iodine found in Lugols iodine. This form of iodine is much more commonly used than ammonium iodide. It’s slightly yellow but is considered clear compared to the dark brown of Lugols iodine which contains elemental iodine.
Ammonium iodide is not commonly used. The only reason most people know about it is likely due to someone trying to avoid the dark temporary staining we may run into while applying Lugols to our skin.
Some people claim ammonium iodide is fine to use, or even a better option. I personally have no interest in this form. I may potentially try it some day after I know my iodine levels have been recovered.
Lugols is the most commonly used form of iodine when trying to find wellness. Potassium iodide is about the second most commonly used form.
Read more about the various forms of iodine at whyiodine.com/types-of-iodine