Ammonium Polyphosphate

Post Date:
Jun 12,2017
Expiry Date:
Dec 09,2017
Detailed Description:
Cas No. :68333-79-9 Specs:APP-I: (NH4)n+2PnO3n+1; APP-II: (NH4PO3)n n>1000
As per the polymerization degree, APP has got three grades, i.e. high polymerization grade, medium polymerization grade and low polymerization grade, and as per the structure, it can be divided into crystalline product and amorphous product. The crystalline product has five varieties, namely from type I to type V. It is in white powder, not easily deliquescent, has got good compatibility with other auxiliaries, insoluble in water, odorless and poison-less. Its gravity is 2.3.

APP-Ⅱis a non-halogen flame retardant. It acts as flame retardant by intumescence mechanism. When APP-Ⅱ is exposed to fire or heat, it decomposes to polymeric phosphate acid and ammonia. The polyphosphoric acid reacts with hydroxyl groups to form a nonstable phosphateester. Following dehydration of the phosphateester, a carbon foam is built up on the surface and acts as an insulation layer.
CAS Registry Number:
68333-79-9
Synonyms:
;PNP;polyphosphoric acids ammonium salts;APP;APP-0;XAP-01;APP-3;APP-1;ammonium polyphosphate flame retardant;Water-SolubleAmmoniumPolyphosphate;CrystallinePhaseIiAmmoniumPolyphosphate;Ammonium Polyphosphate (APP);CF-2;Polyphosphoric acids, ammonium salts;
Molecular Formula:
(NH₄PO₃)n

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