Aqueous ammonia, also known as ammonia solution, is ammonia gas dissolved in water. It has several distinctive properties, including:

1. Physical state: Aqueous ammonia is a clear, colorless liquid with a strong, pungent odor.
2. Concentration: Aqueous ammonia can range in concentration from 5% to 30%, with 10% and 25% being the most common.
3. pH: Aqueous ammonia is a weak base and has a pH of around 11-12.
4. Solubility: Aqueous ammonia is highly soluble in water, and the solubility increases with increasing temperature.
5. Boiling and freezing point: The boiling point of aqueous ammonia depends on its concentration, ranging from 38.8°C (101.8°F) for 5% solution to 117.7°C (243.9°F) for 30% solution. The freezing point of aqueous ammonia is -57.5°C (-71.5°F) for 10% solution and -56.5°C (-69.7°F) for 25% solution.
6. Corrosivity: Aqueous ammonia is mildly corrosive to some metals, but less corrosive than anhydrous ammonia.
7. Toxicity: Aqueous ammonia is less toxic than anhydrous ammonia, but it can still cause skin and respiratory irritation if exposed to high concentrations.

Aqua ammonia, also called ammoniacal liquor, ammonia liquor or ammonia water is produced by dissolving ammonia gas in water. Its proper chemical name is Ammonium Hydroxide.