Organophosphate
Organophosphates (also known as phosphate esters) are a class of organophosphorus compounds with the general structure O=P(OR). They can be considered as esters of phosphoric acid. Like most functional groups organophosphates occur in a diverse range of forms, with important examples including key biomolecules such as DNA, RNA and ATP, as well as many insecticides, herbicides, and nerve agents.
Monopotassium phosphite
Monopotassium phosphite is an inorganic compound with the formula KHPO. A compositionally related compound has the formula HPO2(KHPO). Both are white solids that contain salts of the phosphite anion HPO, the conjugate base of phosphorous acid. These materials have been used in some fertilizers.