It is a kind of important combustion improver for tobacco. It is also used for food additive, sour agent, modifier and buffering agent. When used in tobacco, it can speed up the rate of tobacco combustion and reduce the emissions of tar, to achieve full combustion of tobacco. To some extent, it can increase the acidity of tobacco, improve taste and enhance flavor, reduce irritation and mixed gas. It is an ideal alternative for cigarette combustion.