Hydroxychloroquine and chloroquine are different, albeit structurally similar drugs used/approved to treat malaria. The phosphate molecule makes it a salt. A number of salt versions are available...
Chloroquine diphosphate:
C18H29ClN3.2H3PO4 MW = 515.92
Chloroquine phosphate:
C18H29ClN3.H3PO4 MW = 417.92
Chloroquine sulfate:
C18H26ClN3. H2SO4 MW = 418.00
Chloroquine dihydrochloride:
C18H26ClN3.2HCl MW = 392.84
Hydroxychloroquine has a number of salts available also. A molecule is made into a salt for purposes of formulation and compounding, think solubility, precipitation, for different uses. Also ease, ability, cost to manufacture and upscale, as well as stability.
It’s time for Fauci to go.