805c6b55_thanasia___Conditional_Methods__5
[0] Carbon dioxide (bottled gas only) [1] Hypoxia due to depression of vital centers [2] Direct depression of cerebral cortex, subcortical structures and vital centers; direct depression of heart muscle [3] Moderately rapid [4] Used in closed container [6] Nonhuman primates, free ranging wildlife [7] Effective, but time required may be prolonged in immature and neonatal animals [5] 
Minimal hazard
Euthanasia - Conditional Methods