A wide range of applications: in sewage treatment, mining and mineral processing as a cationic coagulant; In the textile industry used as aldehyde-free color fixing agent; In the papermaking process, it can be used as anion waste capture agent and AKD maturation promoter. It is used as clay stabilizer for drilling and cationic modifier for acidification fracturing in water injection in oilfield industry. In addition, it is also used as a regulator, antistatic agent, humidifier, shampoo and skin moisturizer.