New chemical compounds, bis-quaternary carbamates, having the generic fora: ##STR1## wherein R and R' are radicals selected from the group consisting of methyl, ethyl, propyl, and hydroxyethyl, R.sub.1 and R.sub.1 ' are selected from the group consisting of hydrogen, methyl, and ethyl, n is 1 to 8, R.sub.2 and R.sub.2 ' are selected from the group consisting of hydroxyl, hydrogen, methyl, ethyl, and propyl, and X is one equivalent of a monovalent or polyvalent anion, and having utility as toxic agents.