metasilicate 0 263butyl dioxitol sup 4 8 000pine fragrance 0 200water de ionized 86 380______________________________________ sup 1 btc 2125 m is a mixture of quaternary ammonium salts consisting of 34 by weight c sub 12 and 16 by weight c sub 14 nalkyl dimethyl ethylbenzyl ammonium chloride and about 30 by weight c sub 14 15 by weight c sub 16 2 5 by weight c sub 12 and 2 5 by weight c sub 18 nalkyl dimethyl benzyl ammonium chloride sup 2 permakleer 100 is a 38 solution of ethylenediaminetetraacetate sup 3 neutronyx 656 is a nonyl ethoxy phenol containing an average of 11 moles of ethylene oxide sup 4 butyl dioxitol is available from shell and is diethylene glycol monobutyl ether formulation 2 was prepared essentially according to the procedure set forth for formulation 1 except that the amount of butyl dioxitol was reduced to 6 and the amount of water increased to 88 380 this formulation is shown below in table 2 table 2______________________________________formulation 2ingredients by weight______________________________________btc 2125 m 50 aqueous sup 1 0 421permakleer 100 sup 2 4 210neutronyx 656 sup 3 0 526sodium metasilicate 0 263butyl dioxitol sup 4 6 000pine fragrance 0 200water de ionized 88 380______________________________________ the tuberculocidal effect of the present invention is mediated by contacting a surface containing mycobacterium with the inventive quaternary ammonium salt glycol ether water solution the method for determining the tuberculocidal effects of the inventive composition is defined by the association of official analytical chemists official methods of analysis of the aoac 5th edition 1990 aoac parts 961 02 amp 965 12 the experimental protocol used was as follows mycobacterium bovis atcc 27289 bcg was inoculated into fresh modified proskauer beck medium.