Organic phosphoric acid diamides are a class of compounds featuring two amide groups attached to the phosphorus atom of a phosphoric acid moiety. These molecules play significant roles in various applications due to their unique chemical properties and reactivity. Structurally, they can be derived from the condensation reactions between phosphoric acids and primary or secondary amines, resulting in esters or mixed amides. These compounds are widely used as intermediates in pharmaceuticals, agriculture, and industry. In pharmaceuticals, organic phosphoric acid diamides serve as important precursors for synthesizing drugs with targeted therapeutic effects. They also exhibit potential as metal chelators due to their multidentate nature, making them useful in the removal of heavy metals from contaminated environments. In agricultural applications, these compounds can enhance soil fertility by improving nutrient availability and promoting plant growth. Their ability to form stable complexes with cations makes them valuable for controlled-release fertilizers and pesticide formulations. Furthermore, organic phosphoric acid diamides demonstrate promise in environmental remediation due to their capacity to bind and immobilize toxic metals, thereby mitigating environmental pollution. Overall, the versatility of organic phosphoric acid diamides lies in their ability to form multiple bonds with different functional groups, enabling a wide range of applications across diverse industries.