Ammonium Polyphosphate (APP)

High Purity Ammonium Polyphosphate Manufacturer & Supplier

Ammonium Polyphosphate (APP) is an inorganic polymeric phosphate compound widely used as an efficient phosphorus-based flame retardant, fertilizer additive, and specialty chemical material. Due to its excellent thermal stability, low toxicity, high phosphorus and nitrogen content, and good compatibility with polymer systems, APP has become one of the most important halogen-free flame retardants in modern industries.

With excellent flame-retardant performance and environmental advantages, Ammonium Polyphosphate is widely applied in plastics, coatings, textiles, adhesives, construction materials, and fire protection systems.

We supply high-quality Ammonium Polyphosphate (APP) with stable quality, competitive specifications, customized grades, and reliable global export capability.

Product Information

Product Name

Ammonium Polyphosphate

Common Names

• Ammonium Polyphosphate

• APP Flame Retardant

• Ammonium Polyphosphate Flame Retardant

• Polyphosphoric Acid Ammonium Salt

• Phosphoric Acid Ammonium Salt Polymer

CAS Number

68333-79-9

Molecular Formula

(NH₄PO₃)ₙ

Molecular Weight

Variable polymeric compound

Chemical Type

Inorganic polymer phosphate

Appearance

White powder

Flame Retardant Type

Halogen-free phosphorus-nitrogen flame retardant

Ammonium Polyphosphate Specifications

Customized specifications are available according to customer requirements.

Main Grades of Ammonium Polyphosphate

APP Phase I

Characteristics:

• Lower polymerization degree

• Higher water solubility

• Good fertilizer application performance

Applications:

• Liquid fertilizers

• Agricultural nutrient formulations

• Water-soluble phosphate systems

APP Phase II

Characteristics:

• High polymerization degree

• Excellent thermal stability

• Low water solubility

• Superior flame retardant performance

Applications:

• Engineering plastics

• Coatings

• Fire-resistant materials

• Polymer composites

Key Features of Ammonium Polyphosphate

1. Excellent Halogen-Free Flame Retardant Performance

Ammonium Polyphosphate provides:

• High phosphorus content

• Nitrogen synergistic flame retardant effect

• Low smoke generation

• Reduced environmental impact

It is widely recognized as an environmentally friendly alternative to traditional halogen-containing flame retardants.

2. High Thermal Stability

APP offers:

• Excellent heat resistance

• Good processing stability

• Suitable for high-temperature polymer processing

3. Low Toxicity and Environmental Advantages

Advantages include:

• Halogen-free composition

• Low corrosiveness

• Low smoke characteristics

• Good environmental compatibility

4. Good Compatibility with Polymer Systems

Ammonium Polyphosphate can be used in:

• Thermoplastics

• Thermosetting resins

• Coating systems

• Adhesive formulations

Applications of Ammonium Polyphosphate

1. Flame Retardant for Plastics

Ammonium Polyphosphate is widely used in polymer flame retardant systems.

Applications:

• Polypropylene (PP)

• Polyethylene (PE)

• Polyamide (PA)

• Polyurethane (PU)

• Epoxy resin

Benefits:

• Improves flame resistance

• Reduces combustion intensity

• Enhances fire safety performance

2. Intumescent Fire Retardant Coatings

APP is a key component in intumescent coating formulations.

Applications:

• Steel structure fire protection coatings

• Building fire-resistant coatings

• Industrial protective coatings

Functions:

• Forms protective carbon layers

• Reduces heat transfer

• Improves fire resistance time

3. Construction Materials

Applications:

• Fire-resistant boards

• Insulation materials

• Building panels

• Composite materials

Advantages:

• Improves fire rating

• Enhances material safety

• Provides long-term stability

4. Textile Flame Retardant Treatment

Ammonium Polyphosphate is used for:

• Flame retardant textile finishing

• Fabric treatment

• Fiber modification

Benefits:

• Improves flame resistance

• Provides durable fire protection

5. Adhesives and Sealants

APP is used as a flame retardant additive in:

• Industrial adhesives

• Polymer sealants

• Composite bonding systems

6. Agricultural Fertilizer Applications

Ammonium Polyphosphate is also used as a phosphorus and nitrogen fertilizer component.

Applications:

• Compound fertilizers

• Controlled-release fertilizers

• Agricultural nutrient formulations

Provides:

• Nitrogen source

• Phosphorus source

• Improved nutrient efficiency

Advantages of Our Ammonium Polyphosphate Supply

Reliable Product Quality

We provide:

✔ High purity APP
✔ Stable phosphorus and nitrogen content
✔ Consistent particle size
✔ Strict quality control

Customized Solutions

Available options:

• APP Phase I

• APP Phase II

• Different polymerization degrees

• Customized particle sizes

• Customized packaging

Professional Export Service

We provide:

• SDS documentation

• COA certificates

• Technical Data Sheets

• Global logistics support

Packaging and Storage

Standard Packaging

Available packaging:

• 25 kg PP woven bags with PE liner

• 500 kg jumbo bags

• 1000 kg bulk bags

• Customized packaging

Storage Recommendations

Store Ammonium Polyphosphate:

• In a cool and dry warehouse

• In sealed containers

• Protected from moisture

• Avoid direct sunlight

• Keep away from strong acids and alkalis

Proper storage ensures long-term product stability.

Technical Data Sheet (TDS)

Frequently Asked Questions (FAQ)

What is Ammonium Polyphosphate?

Ammonium Polyphosphate (APP) is an inorganic phosphorus-nitrogen compound mainly used as a halogen-free flame retardant and fertilizer additive.