Product Overview

Product Features

• High Purity & Stability: P2O5 ≥68%, N ≥13%; thermal decomposition temperature >250°C.
• Halogen-Free & Low Smoke: Non-toxic, low corrosion, minimal smoke release during combustion.
• Controllable Solubility: Low polymerization (n<20) water-soluble; high polymerization (n>20) water-insoluble.
• Good Compatibility: Easily blended with carbon sources (e.g., pentaerythritol) and blowing agents.
• Strict QC: COA, MSDS, TDS provided; complies with EU REACH and RoHS.

Physical & Chemical Properties

Physical Properties

1. Appearance: White/off-white crystalline powder
2. Molecular Formula: (NH4)n+2PnO3n+1 (n=30–1000)
3. Purity: P2O5 ≥68%, N ≥13%
4. Density: 1.74 g/cm3 (20°C)
5. pH Value: 4.5–6.5 (10% aqueous solution)
6. Solubility: High polymerization: <0.1 g/100 mL (25°C, water)
7. Decomposition Temperature: >250°C
8. Moisture Content: ≤0.5%

Chemical Properties

1. Flame Retardant Mechanism: Releases polyphosphoric acid at high temperature, promoting char formation; expands into a porous carbon layer to insulate oxygen and heat.
2. Stability: Stable in dry air; hydrolyzes slowly in moisture; decomposes above 250°C releasing NH3.
3. Incompatibility: Avoid strong bases, strong oxidants, and prolonged moisture exposure.

Applications

1. Intumescent Fire Coatings: For steel structures, wood, and building materials (main acid source).
2. Plastics & Polymers: PP, PE, EVA, PU foams, and thermoplastics (halogen-free flame retardant).
3. Construction Materials: Fireproof boards, insulation materials, and sealants.
4. Textiles & Paper: Flame retardant treatment for cotton, linen, and paper products.
5. Agriculture: Slow-release nitrogen-phosphorus fertilizer (low polymerization grade).

Storage & Transportation

Storage

• Conditions: Cool, dry, ventilated warehouse; tightly sealed to prevent moisture and caking.
• Temperature: 10–25°C; avoid direct sunlight and high humidity.
• Shelf Life: 24 months (original packaging).

Transportation

• Classification: Non-hazardous goods.
• Packaging: 25kg/bag (inner plastic, outer woven); 500kg/1000kg big bag optional.
• Precautions: Avoid collision, extrusion, rain, and moisture; do not mix with oxidants.

Operation Notes

• Wear dust mask, safety goggles, and chemical-resistant gloves.
• Operate in well-ventilated areas; avoid dust inhalation.
• In case of skin/eye contact, rinse with plenty of water immediately.

Regulatory Information

• EINECS: 269-789-9
• HS Code: 28353990
• Compliance: REACH, RoHS, GB 14907-2018 (fire coatings)

Full Parameter Table