Potassium Polyacrylate [−CH₂−CH(CO₂K) −] _n is based on potassium salt of polyacrylic acid, mainly used as super absorbent polymer that has the ability to absorb water up to 500 times of its own weight. Potassium polyacrylate functions as a moisture retaining agent that forms water lumps when comes in contact with water molecules. The advantage of potassium salt over other salts is its water retaining capacity as well as water releasing function with higher disintegration time.

Potassium Polyacrylate have cross-linking molecular structure with a hydrophilic group attached. This group is responsible for water absorption to about 500-600 times of its own weight and forms water beads or crystals. When applied on agricultural field, it acts as a water reservoir for plants this polymer traps the water that comes to the field either through rain or irrigational canal. These trapped water gets released after a certain point over prolonged durations and comes as a relief for stakeholder when the conditions become dry. These polymers also absorb vital nutrients from the soil which are then utilized by plants for carrying out various physiological processes.