3 KI + H3PO4 → 3 HI + K3PO4
Reactants:
- KI
- Names: Potassium iodide
, KI
, Thyrosafe
Thyroshield
, Iosat
, Kaliumiodid
, Nukepills
, Potassium Iodide 
- H3PO4
- Names: Phosphoric acid



, Orthophosphoric acid 

, Phosphoric(V) acid
White phosphoric acid 
, [PO(OH)3]
, H3PO4
, E338
, Phosphoric acid (aqueous) 
- Appearance: Hygroscopic colourless crystals
; Thick, colorless, odorless, crystalline solid. [Note: Often used in an aqueous solution.] 
Products:
- HI – Iodane

- Other names: Hydroiodic acid

, Hydrogen iodide 

, Hydronium iodide
HI
, Anhydrous hydriodic acid 
- Appearance: Colorless liquid
; Colorless gas
; Colourless compressed liquefied gas with pungent odour 
- K3PO4 – Potassium phosphate

, Potassium tetraoxidophosphate(3−) 
- Other names: Tripotassium phosphate

, Tribasic
, Tribasic potassium phosphate
E340iii
, E340(iii) 
- Appearance: White deliquescent powder
