The contrast dye used with these tests is an iodine-based or gadolinium ... Unfortunately, there is no test available to diagnose a contrast dye allergy in advance. Skin testing and blood testing ...

The antimicrobial action of iodine is quick and works at low concentrations, which is why it is also used in operating theatres the world over to disinfect the skin ... is used to test for starch ...

The iodine test can also be used with a microscope to ... Sudan III solution is flammable as it is dissolved in alcohol. Avoid contact with skin and eyes.