Soldering iron kits (http://www.amazon.com/iCooker-Soldering-Iron-Watt-Solder/dp/B01774KARE) make use of electricity, heat and various chemical elements that are toxic to humans. While using a soldering iron, watch out for these potential hazards:
Rosin fumes ingestion. When rosin is heated, it generates a wide range of fumes, most of which cause discomfort, allergies and in situations of high exposure causes respiratory problems. Continued exposure to these fumes causes long-term respiratory problems that are very difficult if not impossible to reverse.
Accidental burns represent a significant health risk while soldering. Burns could result from exposure to the soldering iron tip, electrical malfunction or from the above-mentioned fire hazard. Most soldering iron tips operate at temperatures north of 400 degrees Fahrenheit. If one was to come into contact with the tip at this temperature, then it would almost certainly result to a serious burn.
Electric shock is also a potential hazard where an electric current finds its way to the body of the soldering iron operator, once again probably due to an electric fault. Depending on the current and exposure time, this could be serious or mild. Other toxic metals found in solder include cadmium and antimony, both of which have currently been heavily regulated.
Perhaps the most significant potential risk is that of accidental fires that may arise as a result of electrical failures. Soldering irons contain e heat resistive element through which an electric current is passed. Failure in this or another component of the iron could cause a fire. Fires could also result from any other point within the electrical connection.