Also Andre, I hate to tell you this, but Potassium, Sodium and Ammonium Bromide are all corrosive chemicals - like sodium chloride (table salt) and potassium ferricyanide. All of these chemicals are potentially hazardous and must be handled with proper safety precautions. Handled properly, they are not a health or safety problem.

The amount of bromide that you need to use is very small, so it is not a hazard once it is in a dilute solution.