Chemical · Product Detail
Ammonium Polyphosphate (APP-II)
Low-solubility phosphorus-nitrogen acid-source development in intumescent systems.
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Ammonium Polyphosphate (APP-II) at a Glance
ZXCHEM is an ammonium polyphosphate (APP-II) supplier and exporter in China. Ammonium Polyphosphate (APP-II) (CAS 68333-79-9) is white free-flowing powder for low-solubility phosphorus-nitrogen acid-source development in intumescent systems.
Request a free sample for testing.
Standard lead time is approximately 14 days from order confirmation.
Ammonium Polyphosphate (APP-II) Specifications
Supply specifications follow the local ZXCHEM TDS. Values apply to the stated grade; complete-formulation flame performance requires testing.
Commercial Information
Storage & Shipping
Storage Conditions
Keep sealed in a cool, dry, ventilated warehouse. Protect from moisture, heat and contamination; store away from incompatible chemicals.
Packaging Integrity
Inspect bag seams, liners and pallet wrapping before unloading. Protect from rain and punctures, retain lot identification and reseal opened liners promptly.
Packaging
25 kg PE-lined bags
Handling & Protection
Use enclosed powder feeding or local extraction. Wear suitable protective gloves, eye protection and work clothing; avoid dust inhalation and direct contact. Provide controls for fumes during hot processing.
What Is Ammonium Polyphosphate (APP-II)?
Ammonium polyphosphate phase II is a long-chain inorganic phosphate salt used as the acid source in selected intumescent flame-retardant systems. This APP-II powder is a low-water-solubility polymeric grade; it differs from soluble liquid ammonium phosphate fertilizers and from shorter-chain grades.
The 2026 supply limits include phosphorus ≥31.0%, nitrogen ≥14.0%, moisture ≤0.25% and pH 5.5–7.5 in a 10% suspension. Water solubility ≤0.5 g/100 mL, average particle size ≤20 µm and viscosity ≤50 mPa·s in a 10% suspension support practical comparisons of dispersion and handling.
In intumescent development, assess the acid source with the carbon source, binder and gas-generating components as a complete package. Coatings require evaluation of viscosity, dispersion, adhesion, film ageing and expansion after heating. Fire performance belongs to the tested final system.
For polyolefins, thermosets, textile and cable systems, match the phase-II grade to processing conditions, water exposure and mechanical requirements. Retain the suspension basis when comparing test data and protect opened powder bags from moisture.
See related plastics and rubber chemicals in our catalog.
Ammonium Polyphosphate (APP-II) Applications
Intumescent coatings and sealants
Acid-source component for selected expanding protective coatings and sealants. Assess dispersion, wet-state viscosity, adhesion, ageing and the complete fire-test system.
Polyolefins and thermosets
Phosphorus-nitrogen powder for selected PP, PE and thermoset packages. Evaluate processing temperature, compatibility, moisture response and mechanical properties.
Textile, cable and construction materials
Component for selected flame-retardant systems. Assess binder compatibility, durability under service conditions and finished-material fire performance.
Why Source Ammonium Polyphosphate (APP-II) from ZXCHEM
Combined chemical orders
Source several chemical raw materials through one ZXCHEM contact. We coordinate product selection, quotations and suitable consolidated shipments so you can plan the order with one team.
Dedicated R&D Laboratory
Discuss specifications, sample results and application questions with our technical team. Our dedicated R&D laboratory supports product testing and helps clarify material selection.
Experienced Chemical Logistics
ZXCHEM has more than 30 years of experience in dangerous-goods transportation. We coordinate suitable shipments through logistics companies in which we hold equity interests in Qingdao, Shanghai, Guangzhou and Tianjin.
Dedicated Purchasing Support
Your account manager follows the order from quotation and contract signing through shipment and after-sales support. One contact coordinates technical documents, commercial details and delivery updates.
Ammonium Polyphosphate (APP-II) FAQ
Which Ammonium Polyphosphate (APP-II) grade should I choose?
The listed supply specification is Phase II / Phosphorus ≥31%. Check the TDS for assay and impurity limits, then test a sample for compatibility and performance in your process.
Can I request a Ammonium Polyphosphate (APP-II) sample for testing?
Yes. We can provide free samples for testing. Tell us the application, the grade you need and the tests you plan to run.
How is Ammonium Polyphosphate (APP-II) packed and shipped?
Standard packing is 25 kg PE-lined bags. The usual MOQ is 1,000 kg, with a lead time of approximately 14 days from order confirmation. It ships as non-dangerous goods.
Which documents are available for Ammonium Polyphosphate (APP-II)?
The TDS lists the supply specification and the SDS covers safety and transport; both can be downloaded on this page. Each shipment comes with a batch COA.
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