CAS 8017-16-1 appears in our catalog under these names: Polyphosphoric acid, 95%, Polyphosphoric Acid, Polyphosphoric acid, ca 84% (as phosphorus pentoxide) , Polyphosphoric acid, pure, > 84% phosphate (as P2O5), POLYPHOSPHORIC ACID, REAGENT GRADE, 115&. Offered by: Combi-blocks, TRC, Thermo Scientific (Alfa Aesar), Biosynth, Thermo Scientific (Acros). Available pack sizes: 5g, 100g, 25g, 50g, 100ml, 500ml, 1kg, 2kg.