Subheading 283510: Phosphinates (Hypophosphites) and Phosphonates (Phosphites), … etc.
Subheading 283522: Phosphates; of Mono- or Disodium, whether or not Chemically D … etc.
Subheading 283524: Phosphates; of Potassium, whether or not Chemically Defined
Subheading 283525: Phosphates; Calcium Hydrogenorthophosphate (Dicalcium Phospha … etc.
Subheading 283526: Phosphates; of Calcium N.E.C. in Item no. 2835.25, whether or … etc.
Subheading 283529: Phosphates; (other than of Mono- or Disodium, other than of P … etc.
Subheading 283531: Polyphosphates; Sodium Triphosphate (Sodium Tripol … etc.
Subheading 283539: Polyphosphates; other than Sodium Triphosphate (Sodiu … etc.