Used as a fast-setting inorganic binder in construction materials, especially in phosphate-based cements. It provides high early strength, good adhesion to various substrates, and resistance to impact and high temperatures. Commonly applied in rapid repair of concrete structures, anchoring systems, and as a matrix in refractory coatings due to its excellent fire resistance. Also utilized in specialty grouts and plasters where quick hardening and low shrinkage are required. Shows good compatibility with mineral fillers and reinforcements, making it suitable for composite formulations.

Additionally, used as a metal surface treatment to prevent corrosion by forming a phosphate film that improves adhesion between the metal surface and paints or other coatings, increasing durability and extending the service life of metal parts.

In environmental and agricultural applications, it controls phosphate dissolution in soil to manage nutrient delivery in farming systems, enabling slow phosphorus release for efficient plant uptake without runoff into water sources.