Widely used as a cationic polyelectrolyte in water treatment processes, this chemical effectively clarifies water by coagulating and removing suspended particles, colloids, and negatively charged impurities. It is especially effective in municipal and industrial wastewater treatment due to its ability to work at low dosages and across a broad pH range.

Commonly applied in paper manufacturing as a retention and drainage aid, it helps bind fillers and fibers, improving paper strength and production efficiency. It also serves as a key component in the production of coated paper by acting as a pigment dispersant.

In the textile industry, it functions as a dye fixative, enhancing color fastness by binding to negatively charged fibers and reactive dyes, thereby improving dyeing efficiency and reducing dye bleeding.

In cosmetics and personal care products, it functions as an antistatic agent and conditioning ingredient in shampoos, conditioners, and lotions, providing softness and reducing frizz in hair.

It is used in biotechnology and laboratory settings for cell culture applications and as a coating agent to immobilize cells or biomolecules on surfaces. Additionally, it plays a role in the development of sensors and conductive films due to its ability to stabilize nanoparticles and support layer-by-layer assembly techniques.