Penetration of malonic dialdehyde on filtration of tobacco smoke.

It has been found that malonic dialdehyde penetrates through the filters of cigarettes. The filter cigarettes, such as "Club", "F6", "Cabinet", "Semper" and "Kenton" as well as non-filter cigarettes, namely "Salem", "Real" and "Karo" generate malonic dialdehyde during smoking, in amounts ranging from 15.6 to 44.