Disclosed is a composition including flocoumafen and an amount of a configurational stereoisomer of flocoumafen, named enantiomer E.sub.4, such that the ratio of this amount to the amount of flocoumafen in the composition is less than 10%, the enantiomer E.sub.4 being present with the exclusion of a racemic mixture, the enantiomer E.sub.4 having, by chromatographic analysis of flocoumafen, a retention time t.sub.4 having a value such that t.sub.1<t.sub.2<t.sub.3<t.sub.4; t.sub.1, t.sub.2 and t.sub.3 representing the retention times of the configurational stereoisomers of flocoumafen different from the enantiomer E.sub.4, the chromatographic analysis being performed at a temperature of 23.5 C.

Disclosed is a composition including flocoumafen and an amount of a configurational stereoisomer of flocoumafen, named enantiomer E.sub.4, such that the ratio of this amount to the amount of flocoumafen in the composition is less than 10%, the enantiomer E.sub.4 being present with the exclusion of a racemic mixture, the enantiomer E.sub.4 having, by chromatographic analysis of flocoumafen, a retention time t.sub.4 having a value such that t.sub.1<t.sub.2<t.sub.3<t.sub.4; t.sub.1, t.sub.2 and t.sub.3 representing the retention times of the configurational stereoisomers of flocoumafen different from the enantiomer E.sub.4, the chromatographic analysis being performed at a temperature of 23.5 C.

A no-secondary risk rodenticide has ingredients of a gastro-intestinal blocking agent as a dry ingredient, one or more plant matter attractant elements as dry ingredients, and sodium chloride. The blocking agent, the plant matter attractant elements and the sodium chloride are thoroughly mixed together, before being presented in bulk to target rodents.

A no-secondary risk rodenticide has ingredients of a gastro-intestinal blocking agent as a dry ingredient, one or more plant matter attractant elements as dry ingredients, and sodium chloride. The blocking agent, the plant matter attractant elements and the sodium chloride are thoroughly mixed together, before being presented in bulk to target rodents.

A rodenticide composition is described along with a method for using the same to exterminate rodents. The composition features a mixture of a dehydrant, a composition for producing endogenous gas, a dietary emulsifier, a hypercalcemia promoter, and a source of cellulose. After consumption of the composition by a rodent, the dehydrant and source of cellulose cause the rodent to experience dehydration, while the endogenous gas produced by the composition causes bloating and increased digestive stress. The dietary emulsifier and hypercalcemia promoter cause digestive stress, which reduces the rodent's desire to feed and quickens dehydration and death. Once the rodenticide composition is prepared, it may be placed in areas frequented by or infested with rodents so as to kill the rodents once they consume the composition. One or more flavorings, coloring agents, and weather resistant materials may also be added to the composition.

A rodenticide composition is described along with a method for using the same to exterminate rodents. The composition features a mixture of a dehydrant, a composition for producing endogenous gas, a dietary emulsifier, a hypercalcemia promoter, and a source of cellulose. After consumption of the composition by a rodent, the dehydrant and source of cellulose cause the rodent to experience dehydration, while the endogenous gas produced by the composition causes bloating and increased digestive stress. The dietary emulsifier and hypercalcemia promoter cause digestive stress, which reduces the rodent's desire to feed and quickens dehydration and death. Once the rodenticide composition is prepared, it may be placed in areas frequented by or infested with rodents so as to kill the rodents once they consume the composition. One or more flavorings, coloring agents, and weather resistant materials may also be added to the composition.

Disclosed is to a composition including difethialone, containing a configurational stereoisomer of difethialone, referred to as a hetero-stereoisomer, of formula 3-(4-bromobiphenyl-4-yl)-1-(4-hydroxythiocoumarin-3-yl)-1,2,3,4-tetrahydronaphthalene, in which the carbon atoms 1 and 3 of the 1,2,3,4-tetrahydronaphthalene group have different absolute configurations, the composition including an amount of a dextrorotatory enantiomer of the hetero-stereoisomer such that the ratio of this amount to the amount of difethialone in the composition is less than 10%; the amount of the dextrorotatory enantiomer of the hetero-stereoisomer of difethialone in the composition being different from the amount of levorotatory enantiomer of the hetero-stereoisomer of difethialone in the composition.

Disclosed is to a composition including difethialone, containing a configurational stereoisomer of difethialone, referred to as a hetero-stereoisomer, of formula 3-(4-bromobiphenyl-4-yl)-1-(4-hydroxythiocoumarin-3-yl)-1,2,3,4-tetrahydronaphthalene, in which the carbon atoms 1 and 3 of the 1,2,3,4-tetrahydronaphthalene group have different absolute configurations, the composition including an amount of a dextrorotatory enantiomer of the hetero-stereoisomer such that the ratio of this amount to the amount of difethialone in the composition is less than 10%; the amount of the dextrorotatory enantiomer of the hetero-stereoisomer of difethialone in the composition being different from the amount of levorotatory enantiomer of the hetero-stereoisomer of difethialone in the composition.

Disclosed is to a laevorotatory enantiomer of the configurational stereoisomer of difethialone, named hetero-stereoisomer, the formula of which is 3-(4-bromobiphenyl-4-yl)-1-(4-hydroxythiocoumarin-3-yl)-1,2,3,4-tetrahydronaphthalene, in which carbons 1 and 3 of the 1,2,3,4-tetrahydronaphthalene group have different absolute configurations.

Disclosed is to a laevorotatory enantiomer of the configurational stereoisomer of difethialone, named hetero-stereoisomer, the formula of which is 3-(4-bromobiphenyl-4-yl)-1-(4-hydroxythiocoumarin-3-yl)-1,2,3,4-tetrahydronaphthalene, in which carbons 1 and 3 of the 1,2,3,4-tetrahydronaphthalene group have different absolute configurations.