Colorless transparent prismatic crystals, with a molecular weight of 158.05, soluble in water, its aqueous solution is acidic, pH 1.8–2.75. Bulk density is 62.4 lb/ft3 (1.0 g/cm3). It is a high-concentration nitrogen-phosphorus compound fertilizer, which is suitable for alkaline soil and as a raw material for acid-based NPK formulations.