Agent Name

Ammonium polyphosphate

Alternative Name

Polyphosphoric acids, ammonium salts

CAS Number




Major Category

Other Classes


AP 422; AP 462; APP (fireproofing agent); APP 422; Albaplas AP 95; Amgard CL; Amgard MC; Amgard TR; Ammonium ortho and polyphosphate solution; Ammonium orthophosphate, superphosphate; Ammonium polyphosphates; Antiblaze MC; Antiblaze MCM; Budit 3076; Budit 3076DC; Budit 3077; Budit 365; DFP-I; EXO 462; Exolit 263; Exolit 422; Exolit 442; Exolit 454; Exolit 455; Exolit 462; Exolit 470; Exolit AP 422; Exolit AP 423; Exolit AP 462; FR-Cros 480; FR-Cros 484; Fire-Trol LCG-R; Flameguard PT 8; Hostaflam 423; Hostaflam AP 420; Hostaflam AP 422; Hostaflam AP 462; Hostaflam AP 464; Hostaflam TP-AP 751; Hostaflam TP-AP 752; Novawhite; Phos-Chek P 30; Phos-Chek P 40; Phos-Chek P 60; Poly-N 10-34-0; Poly-N 11-37-0; Polymetaphosphoric acid, ammonium salt; Polyphosphoric acid, ammonium salt; Sumisafe; Taien A; Taien H; Polyphosphoric acids, ammonium salts; [ChemIDplus] Ammoniumpolyphosphat; Phos-chek P/30; Phos-chek P/40; [IUCLID]


Phosphate Compounds


Liquid; [OECD SIDS] Aqueous solution; [JECFA] White odorless granules; [Redox Chemicals MSDS]


Permitted for use as an inert ingredient in non-food pesticide products; [EPA] Used as a fertilizer; [OECD SIDS] Used in the chemical, paints-lacquers-varnishes, paper-pulp-board, and polymers industries; Used as a construction-material additive and flame retardant; [IUCLID] Used as a sequestrant and emulsifier for foods; [JECFA]


"Heterogeneous mixture of ammonium salts of linear condensed polyphosphoric acids of general formula H(n+2)P(n)O(3n+1)." Group maximum tolerated daily intake (MTDI) for phosphorus from all sources = 70 mg/kg; [JECFA] Causes no skin irritation and mild eye irritation in rabbits; [OECD SIDS]

Exposure Assessment
Lethal Concentration

LC50 (rat) > 5,090 mg/m3/4hr

Links to Other NLM Databases
Toxicity Information


Chemical Information

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Related Information in HazMap

Industrial Processes with risk of exposure: