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Look at the MSDS. 10 grams of it is enough to kill you. It permanently kills nerves through chemical burning, it doesn't "turn off" pain. A quick 30 second google search will answer most of your questions like this. For any experiment you want to try on yourself, first you need to see what sort of research has already been done, and read the actual lab reports. Don't just base your actions on someone's opinion. Without data in hand, you can't assume their conclusions are proper.