Widely employed as acylation and alkylation reagent in various reactions. It is a strong mineral acid with excellent dehydrating properties. Used in the synthesis of aromatic sulfones, N-substituted amides and 4-aminobenzophenones. It may also be used in dehydration, Fischer-Indole Synthesis, Beckmann Rearrangement and Schmidt Rearrangement reactions. It can be used as a catalyst in the synthesis of various aromatic ketones. Used as a catalyst during the synthesis of dimethyl carbonate (DMC) from urea and methanol. It also acts as an absorbent for the ammonia generated in the process. Also, may be used to prepare silica-supported polyphosphoric acid (PPA-SiO2), an easy to handle, reusable heterogenous catalyst.
Polyphosphoric acid; Acide polyphosphorique; Acide super phosphorique; Condensed phosphoric acid; PPA; Phospholeum; Phosphonic acid; Superphosphoric acid; Tetraphosphoric acid; CAS Number: 8017-16-1; EC Number: 232-417-0; MDL number: MFCD00084480; Molecular Formula: Hn+2PnO3n+1; Molecular Formula: HOP(OH)(O)O(n)H; Molecular weight: 239.95;
