Molecular formula : (NH4PO3)n n>1000
CAS No.: 68333-79-9
EINECS No.: 269-789-9
HS CODE: 2835.3990

Ammonium polyphosphate (Phase II) is 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.

Appearance White powder
P2O5 (w/w) ≥71%
N Content (w/w) ≥14%
Decomposition Temperature (TGA, onset) ＞275℃
Solubility (g/100ml water , at 25ºC) ＜0.5
pH value ( 10% aqueous suspension ) 6.5-7.5
Viscosity (10% aqueous suspension, at 25℃) ＜100 mpa.s
Moisture (w/w) ＜0.25%
Average Partical size (D50) 10µm

Applications:
1. used to prepare many kinds of high-efficiency intumescent coating, the flameproof treatment for multistory building, ships, trains, cables, etc.
2. used as the main flameproof additive for expanding-type flame retardant used in plastic, resin, rubber, etc.
3. make into powder extinguishing agent to be used in large-area outfire for forest, oil field and coal field, etc.
4. In plastics(PP, PVC, PE, etc. ), Polyester, Rubber, and Expandable fireproof coatings.

Packing : 25kg plastic woven bag with PE liner. 20mt/20’fcl without pallets, 18mt/20’fcl with pallets. Other packing as request.

Storage: in dry and cool place, keeping out of moisture and sunshine, shelf life two year.