| Identification | Back Directory | [Name]
Ammonium polyphosphate | [CAS]
68333-79-9 | [Synonyms]
APP
APP-0
APP-3
APP-1
APP Ⅰ
XAP-01
XPNPEP3
Ammonium polyphosphate
AMoMoniuM poly phoaphate
APP50 ( non-coated APP)
Ammonium Polyphosphate (APP)
APP1000 ( non-coated APP)
APP1001 (Melamine Coated APP)
APP1002 (Silicone Coated APP)
Water-SolubleAmmoniumPolyphosphate
polyphosphoric acids ammonium salts
AMMoniuM Polyphosphate(HONOR APP-HS)
AMMoniuM Polyphosphate(HONOR APP-HM)
Anti-APP3 antibody produced in rabbit
ammonium polyphosphate flame retardant
CrystallinePhaseIiAmmoniumPolyphosphate
Anti-XPNPEP3 antibody produced in rabbit
Anti-Aminopeptidase P3 antibody produced in rabbit
Amyloid β/A4 Precursor Protein Fragment 328-332
Anti-X-Pro aminopeptidase 3 antibody produced in rabbit
Anti-Putative Xaa-Pro aminopeptidase 3 antibody produced in rabbit | [EINECS(EC#)]
269-789-9 | [Molecular Formula]
(NH4PO3)n | [MDL Number]
MFCD03454649 | [MOL File]
68333-79-9.mol | [Molecular Weight]
149.087 |
| Chemical Properties | Back Directory | [density ]
1.74[at 20℃] | [vapor pressure ]
0.076Pa at 20℃ | [storage temp. ]
−20°C | [solubility ]
Aqueous Acid (Slightly) | [form ]
Solid | [color ]
White to Off-White | [InChI]
InChI=1S/3H3N.H3O4P/c;;;1-5(2,3)4/h3*1H3;(H3,1,2,3,4) | [InChIKey]
ZRIUUUJAJJNDSS-UHFFFAOYSA-N | [SMILES]
P(=O)([O-])([O-])[O-].[N+]([H])([H])([H])[H].[N+]([H])([H])([H])[H].[N+]([H])([H])([H])[H] | [LogP]
-2.148 (est) | [CAS DataBase Reference]
68333-79-9 | [EPA Substance Registry System]
Polyphosphoric acids, ammonium salts(68333-79-9) |
| Questions And Answer | Back Directory | [Description]
Ammonium polyphosphate (APP) is an organic salt of polyphosphoric acid and ammonia. As a chemical, it is non-toxic, environmentally friendly and halogen-free. It is most commonly used as a flame retardant, selection of the specific grade of ammonium polyphosphate can be determined by the solubility, Phosphorus content, chain length and polymerization degree. The chain length (n) of this polymeric compound can be linear or branched. Depending on the polymerization degree, there are two main families of ammonium polyphosphate: Crystal phase I APP (or APP I), and Crystal phase II APP (or APP II).
- APP phase I has a short and linear chain (n < 100), it is more water sensitive (hydrolysis) and less thermally stable; actually it begins to decompose at temperatures above 150 °C.
- The second family of Ammonium polyphosphate is the APP Phase II; which has an high polymerization degree, with n>1000, its structure is cross linked (branched), and it is an high-quality non-halogenated flame retardant. APP phase II, Ammonium polyphosphate, has an higher thermal stability (the decomposition starts at approximately 300°C) and lower water solubility than APP I.
Appearance
White free-flowing powder
pH (10% slurry -25°C)
5.5-7.5
Acid Value, KOH mg/1g
1.0 Max
Solubility in water (25°C), g/100ml H2O
0.50 Max
Phosphorus (P), w/w%
31.0-32.0
Thermal decomposition onset, °C
285 Min
Average Particle Size, D50, µm
About 15
| [Uses]
- Ammonium polyphosphate is a specialty chemical that finds many different uses in key industries.
- Ammonium Polyphosphate, is an environment-friendly and halogen-free flame retardant. It is the main constituent of many intumescent flame retardant systems: coatings, paints and engineering plastics. It is used to prepare 20% Phosphorous/Nitrogen containing flame retardants, it can be used solely or in conjunction with other materials in the flameproof treatment for textiles, papers, fibers and woods. Special treatment can be used to prepare 50% high concentration flameproof formulations required for special applications.
- The most common ammonium polyphosphate fertilizers have a N-P2O5-K2O (nitrogen, phosphorus and potassium) composition of 10-34-0 or 11-37-0. Polyphosphate fertilizers offer the advantage of a high nutrient content in a clear, crystal-free fluid that remains stable within a wide temperature range and stores well for long periods. A variety of other nutrients mix well with polyphosphate fertilizers, making them excellent carriers of micronutrients typically needed by plants.
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| Hazard Information | Back Directory | [Agricultural Uses]
Ammonium polyphosphate fertilizer is a unique liquid nitrogen-phosphorus fertilizer produced in Russia only by PhosAgro. Maximum phosphorus availability and absorption by plants compared to traditional solid phosphorus-based fertilizers, especially on soils with high calcium carbonate content. It ensures yield increase for different crops during foliar application. It is most effective in dry weather conditions. It is easy to store on farms.
| [Solubility in water]
Ammonium polyphosphate (APP) is a branched or linear polymeric compound with a variable degree of polymerization (n). Generally, Ammonium polyphosphate of a low degree of polymerization (n ≤ 100, crystalline form I) is water soluble or water sensitive, while APP with longer chains (n ≥ 1000, crystalline form II) displays a very low water solubility (<0.1 g/100 mL). In general, long-chain APP starts to degrade at above 300°C, generating ammonia and polyphosphoric acid, while the short-chain one begins decomposing at 150°C.
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