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 (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined. 28 35 25 Calcium hydrogenorthophosphate (dicalcium phosphate) 28 35 25 00 Calcium hydrogenorthophosphate (dicalcium phosphate) Commodity Code Description 28 35 25 00 000 Calcium hydrogenorthophosphate (dicalcium phosphate)