In addition, if you have an allergy to topical iodine cleaners or iodides, you're at no increased risk for these reactions. Unfortunately, there is no test available to diagnose a contrast dye ...

The different lengths of time needed to achieve the starch/iodine complex shows the effect of temperature on reaction rates. Reactions A1-A3 dominate (A3 is very fast) until all HSO3- is consumed. I3- ...