Biphosphate

A biphosphate is any of the following (due to fluctuations in chemical nomenclature over the centuries):
 * One of the two phosphate ions which can be singular to 1 metal ion
 * Monohydrogen phosphate, commonly known as hydrogenphosphate, also known as biphosphate(2-).
 * Dihydrogen phosphate, also known as biphosphate(1-).
 * Any salt of phosphoric acid in which only one of the hydrogen atoms has been replaced by a metal ion
 * Calcium biphosphate is monocalcium phosphate
 * Potassium biphosphate is monopotassium phosphate
 * Magnesium biphosphate is monomagnesium phosphate
 * Sodium biphosphate is monosodium phosphate
 * Any diphosphate, which may be:
 * Any pyrophosphate
 * Any simple pyrophosphate salt (which have no hydrogen atoms)
 * Calcium pyrophosphate
 * Tetrasodium pyrophosphate
 * Zinc pyrophosphate
 * Any organic pyrophosphate or any organic molecule with two phosphate groups
 * Adenosine diphosphate
 * Deoxyadenosine diphosphate
 * Cytidine diphosphate
 * Deoxycytidine diphosphate
 * Guanosine diphosphate
 * Deoxyguanosine diphosphate
 * Thiamine pyrophosphate
 * Thymidine diphosphate
 * Uridine diphosphate
 * Any salt or ester with two phosphate groups
 * Hexestrol diphosphate