Diamidophosphoric Acid, (NH₂)₂PO(OH)

Diamidophosphoric Acid, (NH₂)₂PO(OH), is capable of giving salts of a tribasic acid, such as (NH₂)₂P(OK)₂(OAg). Silver salts have been prepared in which hydrogen of the amido-group is replaced by silver, yielding ultimately the dark brown explosive (NHAg)₂ P(OAg)₃.

The free acid was prepared by hydrolysing the compound (NH₂)₂PO(OC₆H₅) obtained from Cl₂PO(OC₆H₅) and aqueous ammonia, thus

Cl₂PO(OC₆H₅) → (NH₂)₂PO(OC₆H₅) → (NH₂)₂PO(OH) + C₂H₅OH