While it is interesting to contemplate what goes on in the stomach, it may be all academic...
If chlorine dioxide doesn't survive 30 seconds in the saliva of the mouth, it may not make it past the mucous of the esophagus on its way to the stomach. Do you happen to know what the transport time is from the mouth to the stomach?
This also brings up another question... With all the talk of chlorine dioxide being the active ingredient in Miracle-Mineral-Supplement , what is getting into the blood if the chlorine dioxide is used up in the mouth and throat?