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Upper level
Ammonium polyphosphate
Benzophenone-2 (BP-2)
Benzophenone-6 (BP-6)
Bis(sodium sulfopropyl) Disulfide (SPS)
Dibenzoylmethane (HS-83)
Dibutyl Ether
Dicumyl Peroxide (DCP)
Hexafluoro-1-Butanol (HFB)
3-Mercaptopropane Sulfonic Acid Sodium Salt (3-MPS)
Octafluoro-1-Pentanol (OFP)
Photocure BDK
Photocure 1173
Photocure ITX
1,3-Propane Sultone
n-Propyl bromide (nPB)
3-(1-Pyridino)-1-propane Sulfonate
Sodium Dodecylbenzene Sulfonate
Strearoyl benzoyl methane (HS-50)
Tetrafluoro-1-Propanol (TFP)
THPC
THPC-Urea
THPS-Urea

Ammonium Polyphosphate (APP)


Identification

Synonyms: APP; Polyphosphoric acids, ammonium salts

CAS No.: 68333-79-9

Molecular Formula: (NH4PO3)n

Structural Formula:

Phase II:

Application*

Phase I: intumescent flame-retardant component for coating, wood, paper, plywood, cable, fiber, plastic, rubber, resin, component of fire-extinguishing dry-powder for fire of forest, oil-well, and coal mine.

Phase II: Due to its low solubility in water, Phase II APP is particularly suitable as an "acid donor" for intumescent flame-retardant paints or coating, which is applied in steel structures, wood/plastic applied in building material, adhesives and sealants, non-halogenated flexible and rigid polyurethane foams, as well as cellulose-contained paper and wood products

Specification*

 

Item

 Phase I

 Phase II

 Phase II Microencapsulated by Melamine
P content - 31-33% 28% min.
N content 14~15% 13-15% 15.5% min.
P2O5 Content 69% min. - -
 water - 0.25% max 1.0% max.
Average Polymerization Degree 70 >1000 >1000
PH (1% water suspension/solution) 5.5~6.5 5.5-7.5 6.5~7.5
PH (10% water Solution) 5.2~6.2 - -
Water Soluble Matter (25 deg. C, 10% suspension) - 0.5% max 0.05% max.
Viscosity in Water (25 deg. C, 10% suspension) - 100mPa.S max 20mPa.S max.
Density - 1.9g/cm3 1.9g/cm3
Bulk density - ~0.7g/cm3 ~0.7g/cm3
Decomposition T - 275 deg C. 300 deg. C
Average particle size 325 mesh 8~15 microns 10~20 microns
Appearance white powder white powder white powder

 

Standard Packing

25kgs net /paper bag with PE lining bag; 1000kg/supper sacks

Risks and Safety Info

Not regulated by UN, US DOT, EU

May cause slight skin irritation but not irritating to the mucous membranes.

S 24/25 Avoid contact with skin and eyes

React with alkaline solutions to form ammonia and can contribute to eutrophication of stagnant waters.

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