Ammonia or azane is a compound of nitrogen and hydrogen with the formula NH3. It is a colourless gas with a characteristic pungent smell. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers. Ammonia, either directly or indirectly, is also a building block for the synthesis of many pharmaceuticalsand is used in many commercial cleaning products. Although in wide use, ammonia is both caustic and hazardous.
Synonyms Ammonium hydroxide solution, Ammonia water
Physicochemical Information
Density 0.86 kg/m3
Melting Point −77.73 °C
Boiling Point −33.34 °C
Explosion Limit 15–28%
PH Value (H₂O, 20 °C) strongly alkaline
Refractive Index 1.3327
Vapor Pressure 8573 h Pa
Solubility 47% w/w (0 °C)in Water