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 . A method of reducing cytotoxicity and/or mutagenicity in tobacco smoke comprising:
 applying a solution comprising a mixture of glycerin and calcium sulfate 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 present in an amount of about 8 to about 13% by weight of the tobacco smoking mixture and wherein the calcium sulfate 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.   
     
     
         2 . The method of  claim 1 , wherein the tobacco smoking mixture further comprises palladium. 
     
     
         3 . The method of  claim 2 , wherein the palladium is a palladium salt. 
     
     
         4 . The method of  claim 3 , wherein the palladium salt is K 2 PdCl 4 . 
     
     
         5 . The method of  claim 2 , wherein the palladium salt is present in an amount of about 0.03 to about 0.10% by weight of the tobacco smoking mixture. 
     
     
         6 . The method of  claim 1 , wherein the calcium sulfate is present in an amount of about 3 to about 8% by weight of the tobacco smoking mixture. 
     
     
         7 . The method of  claim 6 , wherein the calcium sulfate is present in an amount of about 4 to about 6% by weight of the tobacco smoking mixture. 
     
     
         8 . The method of  claim 1 , wherein the glycerin and calcium sulfate are combined in a liquid solution and the solution is sprayed onto the cut filler. 
     
     
         9 . The method of  claim 3 , wherein the glycerin, calcium sulfate and palladium salt are combined in a liquid solution and the solution is sprayed onto the cut filler. 
     
     
         10 . A tobacco smoking mixture capable of producing smoke when burned comprising tobacco cut filler and a mixture of glycerin and calcium sulfate wherein the glycerin is present in an amount of about 8 to about 13% by weight of the tobacco smoking mixture and the calcium sulfate 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. 
     
     
         11 . The tobacco smoking mixture of  claim 10 , wherein the tobacco smoking mixture further comprises palladium. 
     
     
         12 . The tobacco smoking mixture of  claim 11 , wherein the palladium is a palladium salt. 
     
     
         13 . The tobacco smoking mixture of  claim 12 , wherein the palladium salt is K 2 PdCl 4 . 
     
     
         14 . The tobacco smoking mixture of  claim 12 , wherein the palladium salt is present in an amount of about 0.03 to about 0.10% by weight of the tobacco smoking mixture. 
     
     
         15 . The tobacco smoking mixture of  claim 10 , wherein the calcium sulfate is present in an amount of about 3 to about 8% by weight of the tobacco smoking mixture. 
     
     
         16 . The tobacco smoking mixture of  claim 15 , wherein the calcium sulfate is present in an amount of about 4 to about 6% by weight of the tobacco smoking mixture.