Chinese Name: Ammonia Water

Chinese Alias: Ammonium Hydroxide

CAS Number: 1336-21-6

EINECS Number: 215-647-6

Molecular Formula: NH₃·H₂O

Molecular Weight: 35.0458

Physicochemical Properties:

Melting Point: -77℃

Boiling Point: 165°C at 760 mmHg

Vapor Pressure: 5990 mmHg at 25°C

Product Use: Used in fertilizers and pharmaceuticals.

Industrial ammonia water is an aqueous solution containing 25% to 28% ammonia. Only a small portion of ammonia molecules in ammonia water reacts with water to form ammonium hydroxide, which is a weak base existing solely in ammonia water. The freezing point of ammonia water is related to its concentration; the commonly used 20% (wt) concentration has a freezing point of approximately -35°C. It generates heat upon neutralization with acids. The specific heat capacity is 4.3×103 J/kg·℃ (for 10% ammonia water).