Abstract: A substituted 1-(2-chloroethyl)-3-acyl-3-alkyltriazene of the formula: ##STR1## in which R.sub.1 is 1-oxoalkyl containing from two to eight carbon atoms, fluorinated 1-oxoalkyls containing from two to eight carbon atoms and substituted with up to three fluorine atoms, benzoyl, phenylacetyl, carboalkoxy containing from two to eight carbon atoms, fluorinated carboalkyl containing from two to eight carbon atoms and up to three fluorine atoms, carbophenoxy, N-phenyl aminocarbonyl, N-alkyl aminocarbonyl containing from two to eight carbon atoms, thiocarbamoyl, N-alkylthiocarbamoyls with from two to eight carbon atoms, N-phenylthiocarbamoyl, dialkylphosphonates in which the alkyl groups can be the same or different and each contains from one to seven carbon atoms, phenylsulfonyl, and meta or para-substituted phenylsulfonyl in which the meta or para substituent is methyl, ethyl, methoxy, ethoxy, fluoro and chloro; and R.sub.