The saturation point of ammonium carbonate at 25°C is about 210 g / L. At this concentration, the solution is completely saturated and cannot dissolve any more ammonium carbonate. Any additional ammonium carbonate added to the solution will simply precipitate out of solution as a solid. The saturation point of ammonium carbonate is affected by several factors, including temperature, pressure, and presence of any other substances in the soluton.