Aluminum phosphate
Description
Aluminum phosphate (CAS 7784-30-7), also referred to as aluminum orthophosphate, is an inorganic salt used across industrial and pharmaceutical manufacturing. It functions primarily as a pH buffer, binder, and flame retardant depending on the application sector.
In pharmaceutical manufacturing, it is used as an active antacid ingredient and as a binder in tablet formulations, where controlled release and gastric buffering are required. The construction and refractory industries use it as a high-temperature binder.
This material is essential in ceramic coatings, cements, and fireproofing materials that must withstand thermal stress. Textile and paper processors apply it as a flame retardant treatment and sizing agent to meet fire resistance specifications.
In water treatment, it acts as a coagulant aid to support flocculation and clarification of process water and effluents. Aluminum phosphate is available as a white powder and in gel or colloidal suspension forms depending on the target application.
Pharmaceutical-grade material is supplied to USP and Ph. Eur. specifications, while technical-grade powder serves industrial and construction uses. These standards ensure the highest level of purity for sensitive applications.
Food-grade variants meeting FCC standards are available for regulated food and nutraceutical applications. This versatility makes it a critical component for manufacturers requiring reliable chemical performance across diverse global markets.
Physical Properties
| Melting Point | >1460 °C |
| Density | 2.56 g/cm³ @ Temp: 23 °C |
| Appearance | Aluminum orthophosphate is a white crystalline solid which is often used in liquid or gel form |
| Color | White |
| Form | Powder |
| Water Solubility | Insoluble |
Safety & Handling (Learn More)
Trade & Regulatory
| HS Code | 28352990 |
| UN Number | 3260 |
| ADR Class | 8 |
| Packing Group | II |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 1 |
Documentation
Other Names
aluminum orthophosphate|aluminium orthophosphate|aluminum monophosphate|aluminium monophosphate|ALUMINIUM PHOSPHATE|Aluminum acid phosphate|Aluphos|Aluminum phosphate (1:1)
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