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| Synonyms:APP APPolyphosphoric acids, ammonium salts Polyammonium phosphate Ammonium polyphosphates Molecular Formula:H12N3O4P Molecular Weight: 149.086741 HS Code: 2835399000 Grade:Water-soluble; water-insoluble Hazard Class:General Cargo | |||||||||
68333-79-9
bosschemical
68333-79-9
| Specification | Standard | Test Result |
| Appearance | White fine powder | Complied |
| P₂O₅ | >58% | 58.21%(w/w) |
| Nitrogen | >18.0%(w/w) | 18.15%(w/w) |
| pH value | 4.5–6.5 | 5.45 |
| Solubility in Water | Freely soluble in water | Freely soluble in water |
1. Halogen-Free Flame Retardant For Plastics: Ammonium polyphosphate (APP, CAS 68333-79-9) is a phosphorus-nitrogen intumescent flame retardant widely used in PP, PE, PU, epoxy and rubber compounds, promoting an insulating char layer that reduces heat release and smoke during combustion without halogens.
2. For Intumescent Fire-Retardant Coatings: APP is a key component in intumescent coatings for steel structures and wood surfaces, swelling under heat to form a protective char barrier that delays temperature rise and extends fire-protection time for industrial and architectural applications.
3. Low Water Solubility (Phase II) For Durable Applications: High-polymerization-degree APP-II offers low water solubility and good thermal stability, enabling long-term flame-retardant performance in outdoor plastics, cable compounds and high-temperature processing without compromising material properties.
4. For Wood, Board & Textile Fire Treatment: APP provides effective fire retardancy for wood, fiberboard, textiles and paper through impregnation or surface treatment, reducing flame spread and supporting fire-safety requirements in furniture, construction and transportation.
5. For Agricultural Slow-Release Fertilizer: As a nitrogen-phosphorus source, APP is used in slow-release and compound fertilizers, providing balanced long-term nutrition for crops while reducing nutrient leaching in field and greenhouse applications.
6. Consistent Quality For Global Industry: Supplied as white crystalline powder in Phase I and Phase II grades with high phosphorus content, consistent quality and flexible packaging, APP gives plastic, coating, textile and fertilizer manufacturers a dependable halogen-free flame-retardant and nutrient source.
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