Didodecyl Dimethyl Ammonium Chloride (DDAC) is White or light yellow cream, soluble in polar solvents, with small solubility in water, epispastic and antistatic, capable of emulsifying, dispersing and antisepticising. DDAC , is a kind of cationic surfactant. DDAC belongs to a double chain quaternary ammonium salt compounds.

Didodecyl Dimethyl Ammonium Chloride is a kind of wool mothproofing agent to control insect disease. In medicine health and civilian DDAC is used as disinfectant and antiseptic agent. Didecyl Dimethyl Ammonium Chloride is one of the third generation products of quaternary ammonium salt fungicide, and its killing ability of microorganism is significantly higher than that of first and two generation.
DDAC can be used for oilfield water injection and microbicides and algae fungicidal in industrial circulating cooling water system. We can use filling, dipping or spraying method to useit as wool moth-proofing. Combining with chlorine dioxide,Didodecyl Dimethyl Ammonium Chloride serves as a fungicide to process hard surface. In addition , Didodecyl Dimethyl Ammonium Chloride acts as disinfectant cleaner for Linen recommended for use in hospitals, hotels and industries.