Intumescent char
Forms an insulating foam char that protects the substrate.
APPLICATION
Polyphosphate d'ammonium (APPLICATION) Supplier from China
Ammonium polyphosphate (APPLICATION) is a halogen-free phosphorus–nitrogen flame retardant used in intumescent coatings, polypropylène, époxy, polyuréthane, textiles and wood. SUNCHEM supplies APP with a batch COA on every shipment; the TDS is sent on request.
CAS 68333-79-9 · (NH₄PO₃)n · Phosphorus–nitrogen flame retardant
- Lot de COA avec chaque expédition
- Des échantillons pour vos essais
- Support technique pour votre essai
Présentation du produit & avantages clés
APP releases phosphoric acid when heated, which chars the polymer, and ammonia, which blows the char into an insulating foam. With a carbon source such as pentaerythritol and a blowing agent such as melamine it forms the classic intumescent system used in fire-protective coatings for steel and wood, and in halogen-free polypropylene.
Long-chain crystal phase II APP has low water solubility and suits plastics and coatings; surface-treated grades further reduce water pick-up. Phosphore, nitrogen, solubility and particle size are the numbers to compare.
Halogen-free, low smoke
No bromine or chlorine, with low smoke and corrosive gas.
Specified on your terms
We quote against your phosphorus and nitrogen content, crystal phase, degree of polymerization, water solubility, particle size and moisture and send the batch COA for each lot.
Spécifications techniques
| Parameter | Typical value |
|---|---|
| Nom du produit | Polyphosphate d'ammonium |
| Synonymes | APPLICATION; polyphosphoric acid, ammonium salt |
| Numéro CAS. | 68333-79-9 |
| Formule | (NH₄PO₃)n |
| Apparence | Poudre blanche |
Phosphorus and nitrogen content, crystal phase, degree of polymerization, water solubility, particle size and moisture limits depend on the producer grade and are stated on the TDS and batch COA; the limits for your order are confirmed in the quotation and contract.
Applications by Polymer
Where APP is used, and what to confirm before you switch supply.
Intumescent fire-protective coatings
With pentaerythritol and melamine in fire-protective coatings for steel structures and wood.
Check before trial
- Coating type and fire standard
- Crystal phase and solubility
- Monthly volume
Halogen-free polypropylene
With a charring agent in halogen-free PP parts and in polyolefin compounds.
Check before trial
- UL 94 target
- Surface-treated or not
- Particle size
Epoxy, polyuréthane, textiles and wood
Used in epoxy, rigid PU foam, textile back-coatings, wood and paper.
Check before trial
- Process
- Water resistance needs
- Sample for trials
Selection & comparaison
Choosing the right APP grade
| Your requirement | What usually works |
|---|---|
| Intumescent coatings | Crystal phase II APP with low solubility |
| Halogen-free PP | Phase II or surface-treated APP with a charring agent |
| Humid service conditions | Surface-treated (coated) grade |
| Replacing an existing supplier | Send your current TDS or COA; we quote against the parameters you approve |
Emballage & stockage
Emballage
Tell us the bag or drum size and pallet requirements you need; we confirm the packaging with the quotation.
Storage
Keep bags closed in a dry store; APP absorbs moisture.
Du premier e-mail à la fourniture approuvée
Name the end use
Name the polymer and the fire rating you must meet — UL 94 class and thickness, LOI or cable standard.
Compare the numbers that matter
Phosphorus and nitrogen, crystal phase, degree of polymerization, water solubility, particle size and moisture.
Design the full system
APP works with a carbon source and blowing agent; test the complete formula, not APP alone.
Trial, then lock the spec
Compound a trial batch, run your fire and mechanical tests, and keep the approved lot COA as the reference.
Dites-nous votre besoin. Nous correspondons à la note.
Tell us the polymer, the fire rating you need, the quantity and the destination port. Add your current specification and we will quote against it.
| Information | Example |
|---|---|
| Application | Revêtements, PP, époxy, PU, textiles, bois |
| Required specification | Crystal phase, solubilité, la taille des particules |
| Emballage | Bag or drum size; pallets |
| Quantity | Échantillon / trial order / annual volume |
| Destination | Country and port |
| Documents needed | COA, FDS, DT, RoHS/REACH |
Related products
Hydroxyde d'aluminium
Mineral flame retardant and smoke suppressant for cables and resins.
View product →Polyphosphate d'ammonium (APPLICATION) FAQ
What is APP used for?
In intumescent fire-protective coatings, halogen-free PP, époxy, PU foam, textiles, wood and paper.
What is phase II APP?
A long-chain crystal form with low water solubility, preferred for plastics and coatings.
Which parameters should I compare between offers?
Phosphorus and nitrogen content, crystal phase, solubilité, particle size and moisture.
Can I get the TDS?
Oui. Send an inquiry with your application and we email the TDS.
