Chlorine dioxide (ClO2) was first discovered by Humphrey Davy in 1811, who described it as exploding when collected, often releasing light and heat.
Industrially, it replaces bleaching with chlorine, as the use of chlorine produces very toxic dioxins. The so-called “chlorine-free” bleached paper is therefore not bleached with chlorine, but rather chlorine dioxide or chlorine peroxide (Cl2O2) bleached.
Chlorine dioxide is also used as a disinfectant for drinking water and wastewater, as well as to kill mold and spores.
In addition, chlorine dioxide is very controversial when it comes to its use as a medicine. The official tenor is that there is no “reputable evidence” (source wikipedia)before.
On the other hand, there are records and patents, especially from Andreas Ludwig Kalcker, who spent most of his life in Spain, now lives in Switzerland. He conducts research in the field of biophysics, has been involved in the therapeutic use of chlorine dioxide for almost two decades, and has had several in the course of his work Patents Registered, Books written, offers Online seminars and much more.
When assessing sense and nonsense, you take into account who benefits from the use of various preparations and then decide for yourself who you believe.