Polyphosphoric Acid PPA Synonyms: Condensed Phosphoric Acid,Multiphosphoric Acid Chemical Formula: Hn+2PnO3N+1 CAS: 8017- ... ,corrosive,compatible with water ,hydrolyzed into ortho-phosphoric acid. Usage: Polyphosphoric acid are used as catalyst in the chemical and ... Specification : 105% ,115%,116%,117% 115% Polyphosphoric Acid Index: Item Index Best quality Firt Class Qualified Appearance Colorless ...