Description

Ammonium Polyphosphate is an inorganic salt of polyphosphoric acid and ammonia, widely recognized for its role as an effective flame retardant and fertilizer component. Its significance lies in its ability to provide non-halogenated, environmentally friendlier fire protection and a controlled-release source of nitrogen and phosphorus. This makes it a critical raw material for manufacturers in the polymer, construction, coatings, and agricultural industries seeking to enhance product safety and performance.

Application

• Flame Retardant in Polymers: A key component in intumescent coatings and formulations for plastics (e.g., polyolefins, polyurethanes, epoxy resins) to meet fire safety standards in construction, electronics, and textiles.
• Forest Fire Retardant: Used in aerial firefighting slurries due to its ability to coat and cool fuels, preventing combustion.
• Controlled-Release Fertilizer: Acts as a slow-release source of nitrogen and phosphorus in agricultural and horticultural applications, improving nutrient use efficiency.
• Paper & Textile Treatment: Imparts flame-resistant properties to specialty papers, cardboard, and fabrics.
• Adhesives & Sealants: Incorporated to improve the fire resistance of industrial adhesives and construction sealants.
• Ceramic & Refractory Materials: Serves as a binder and fluxing agent in the production of specialized ceramics.

Basic Information

Product Name	Ammonium Polyphosphate
CAS No.	68333-79-9
Molecular Formula	(NH4PO3)n
Molecular Weight	Variable (Polymer)
Synonyms	APP; Ammonium phosphate, glassy; Polyphosphoric acids, ammonium salts; Phosphoric acid, ammonium salt, glassy; Exolit AP 422; FR CROS 484; Budit 3141; Antiblaze LR3; Hostaflam AP 422; NH4PO3
EINECS	269-789-9

Quality Control

Our Ammonium Polyphosphate is manufactured under strict quality management systems. Each batch undergoes rigorous testing for key parameters including phosphorus and nitrogen content, degree of polymerization, particle size distribution, and solubility to ensure consistency and performance. Certificates of Analysis (COA) are provided with every shipment, and we can support compliance with relevant industry standards such as REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent caking and degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White powder or granules
Identification (IR)	Conforms
Assay (as P2O5)	≥ 70.0 %
Nitrogen (N) Content	≥ 14.0 %
pH (10% suspension)	5.0 - 7.0
Particle Size (D50)	10 - 25 µm (or as specified)
Solubility in Water	Low / Insoluble grade available
Loss on Drying	≤ 1.0 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.