HSN code HSN description GST 2809 Diphosphorus Pentaoxide; Phosphoric Acid; Polyphosphoric Acids, Whether Or Not Chemically Defined 5% 28091000 Diphosphorus Pentaoxide; Phosphoric Acid; Polyphosphoric Acids, Whether Or Not Chemically Defined – Diphosphorus Pentaoxide 5% 280920 Phosphoric Acid And Polyphosphoric Acids 5% 28092010 Diphosphorus Pentaoxide; Phosphoric Acid; Polyphosphoric Acids, Whether Or Not Chemically Defined – Phosphoric…