Dehydroacetic acid (DHA) is a broad spectrum of fungicide, it has strong inhibition on bacteria,mold and yeast, specially on mold. It can dissolve in several kind of oils. It has poor solubility in water. It is stable to heat, The antimicrobial action will not be affected even heat to 120°C , so it can be used in all kinds of heat process food. But it is evaporative along with water steam. So it should be added during the later period of heating process, and accordingly the amount should increase. Its inhibiting action is more better when in acid environment.