Additives for tobacco cut filler

Abstract

Tobacco smoking mixtures capable of producing tobacco smoke are provided which reduce the cytotoxicity and/or mutagenicity of the tobacco smoke. The tobacco smoking mixtures include tobacco cut filler and glycerin in an amount effective to reduce cytotoxicity and/or mutagenicity of smoke produced by the tobacco smoking mixture. The tobacco smoking mixtures enable a further reduction in cytotoxicity and/or mutagenicity when glycerin is combined with palladium or salts of calcium and/or magnesium.

1 - 6 . (canceled) 
     
     
         7 . A tobacco smoking mixture capable of producing smoke when burned comprising tobacco and a mixture of glycerin and magnesium or calcium salts selected from the group consisting of magnesium nitrate, magnesium chloride, magnesium acetate, magnesium sulfate, calcium nitrate, calcium chloride, calcium acetate, calcium sulfate and mixtures thereof, wherein the glycerin is present in an amount of about 8 to about 13% by weight of the tobacco smoking mixture, and wherein the mixture of glycerin and the magnesium or calcium salt is present in an amount effective to reduce the cytotoxicity and/or the mutagenicity of the smoke produced when the tobacco smoking mixture is burned. 
     
     
         8 . The tobacco smoking mixture according to  claim 7 , wherein the magnesium or calcium salt is in an amount of about 3 to about 8% by weight. 
     
     
         9 . The tobacco smoking mixture according to  claim 8 , wherein the magnesium or calcium salt is magnesium acetate, magnesium chloride or calcium chloride. 
     
     
         10 . The tobacco smoking mixture according to  claim 9 , wherein the magnesium or calcium salt is magnesium acetate. 
     
     
         11 . The tobacco smoking mixture according to  claim 7 , wherein the magnesium or calcium salts are in an amount of about 4 to about 6% by weight. 
     
     
         12 . The tobacco smoking mixture according to  claim 7 , wherein the tobacco smoking mixture further comprises palladium. 
     
     
         13 . The tobacco smoking mixture according to  claim 7 , wherein the tobacco smoking mixture comprises a tobacco rod of a cigarette. 
     
     
         14 . The tobacco smoking mixture according to  claim 13 , wherein the tobacco rod is surrounded by a wrapper and a filter is at one end of the wrapper. 
     
     
         15 . A tobacco smoking mixture capable of producing smoke when burned comprising at least about 85% by weight tobacco cut filler and about 8 to about 13% by weight glycerin, wherein the glycerin effectively reduces the cytotoxicity and/or mutagenicity of the smoke produced when the tobacco smoking mixture is burned by at least about 10% of smoke particulate phase cytotoxicity and/or mutagenicity. 
     
     
         16 . A tobacco smoking mixture capable of producing smoke when burned comprising at least about 85% by weight tobacco cut filler and about 3 to about 8% by weight of magnesium or calcium salts selected from the group consisting of magnesium nitrate, magnesium chloride, magnesium acetate, magnesium sulfate, calcium nitrate, calcium chloride, calcium acetate, calcium sulfate and mixtures thereof, wherein the magnesium or calcium salts effectively reduce the cytotoxicity and/or mutagenicity of the smoke produced when the tobacco smoking mixture is burned by at least about 10% of smoke particulate phase cytotoxicity and/or mutagenicity. 
     
     
         17 . A method of reducing cytotoxicity and/or mutagenicity in tobacco smoke comprising
 applying a solution comprising a mixture of glycerin and a palladium salt onto tobacco cut filler to form a tobacco smoking mixture capable of producing tobacco smoke when burned,   forming a smoking article comprising a wrapper, the tobacco smoking mixture and a filter, and   burning the smoking article to produce tobacco smoke with reduced cytotoxicity and/or mutagenicity,   wherein the glycerin is used in an amount of about 8 to about 13% by weight of the tobacco smoking mixture and wherein the mixture of glycerin and palladium salt is present in an amount effective to reduce the cytotoxicity and/or the mutagenicity of the smoke produced from the tobacco smoking mixture upon burning.   
     
     
         18 . The method of  claim 17 , wherein the palladium salt is present in an amount of about 0.03 to about 0.10% by weight of the tobacco smoking mixture. 
     
     
         19 . A method of reducing cytotoxicity and/or mutagenicity in tobacco smoke is provided comprising
 applying a solution comprising a mixture of glycerin and a magnesium or calcium salt selected from the group consisting of magnesium nitrate, magnesium chloride, magnesium acetate, magnesium sulfate, calcium nitrate, calcium chloride, calcium acetate, calcium sulfate and mixtures thereof, onto tobacco cut filler to form a tobacco smoking mixture capable of producing tobacco smoke when burned,   forming a smoking article comprising a wrapper, the tobacco smoking mixture and a filter, and   burning the smoking article to produce tobacco smoke with reduced cytotoxicity and/or mutagenicity,   wherein the glycerin is used in an amount of about 8 to about 13% by weight of the tobacco smoking mixture, and wherein the mixture of glycerin and magnesium or calcium salt is present in an amount effective to reduce the cytotoxicity and/or the mutagenicity of the smoke produced from the tobacco smoking mixture upon burning.   
     
     
         20 . The method of  claim 19 , wherein the magnesium or calcium salt is used in an amount of about 3 to about 8% by weight of the tobacco smoking