Section 06 Products of the chemical or allied industries 28 Inorganic chemicals; organic or inorganic compounds of precious metals, of rare - earth metals, of radioactive elements or isotopes 28 35 Phosphinates, phosphonates, phosphates and polyphosphates 28 35 25 Calcium hydrogeorthophosphate ("dicalcium phosphate") 28 35 25 00 Calcium hydrogeorthophosphate ("dicalcium phosphate") Commodity Code Description 28 35 25 00 000 Calcium hydrogeorthophosphate ("dicalcium phosphate")