Didecyl dimethyl ammonium chloride(DDAC),Cas:7173-51-5, also known as didecyl dimethyl ammonium chloride, is a white solid at room temperature and pressure. It can dissolve in water and polar organic solvents, but is insoluble in non-polar organic solvents. This substance has stable chemical properties and is not easily decomposed. Double decyltrimethylammonium chloride Cas:7173-51-5 belongs to the double chain Quaternary Ammonium Salt class, and is used in many products due to its bactericidal, antiviral, and bactericidal properties. From the perspective of functional classification in disinfection, bis (decaalkyl) dimethyl ammonium chloride belongs to the category of intermediate level disinfectants and is a broad-spectrum virus disinfectant component. This type of quaternary ammonium salt disinfectant is widely used, has a mild odor, is safe, non-toxic and non irritating, can be safely used for women and infants, is soluble in water without residue, and has multiple advantages such as storage resistance.