While the ingredients required to make the gas are readily obtained, and unrestricted, the use of the gas to end one’s life presents a number of significant problems. Of major concern is the risk to others when large amounts of hydrogen sulfide gas are produced. Apart from the likelihood of annoying everyone in the area with the stink, there are real dangers to those who might try to enter the area or attempt resuscitation. Indeed emergency personnel are trained to be careful entering an area where this gas is suspected, and not to attempt mouth to mouth resuscitation.
Clearly if one is planning to use this method it is essential that a site is chosen where leakage of the gas can not endanger innocent people and prominent warning signs should be displayed. The use of a car parked in an outdoor location with warning signs displayed prominently on the windows would seem to be the most responsible choice.
While it has been reported that as the concentration of the gas rises,there is a rapid inhibition of the sense of smell, so that one does not necessarily experience the sickening stench right to the point of death, it could not be considered a particularly peaceful.