Ammonium Hydroxide

Ammonium hydroxide


Ammonium hydroxide is a colorless, liquid solution with a characteristic and pungent odor. It is ammonia combined with water. Ammonia (NH3) is a compound consisting of nitrogen and hydrogen. Both ammonia and ammonium hydroxide are very common compounds, found naturally in the environment (in air, water, and soil) and in all plants and animals, including humans. Ammonia is a source of nitrogen, an essential element for plants and animals. Ammonia is also produced by the human body – by our organs and tissues and by beneficial bacteria living in our intestines.

Ammonia solution, also known as ammonium hydroxide, ammonia water, ammonical liquor, ammonia liquor, aqua ammonia, aqueous ammonia, or simply ammonia, is a solution of ammonia in water.

· Molecular Formula: NH3.H2O

· CAS No.: 1336-21-6

· EINECS No.: 215-647-6

· Hazard Class: 8

· UN NO.: 2672

· Purity: 20% 25% 28%

· Appearance: colorless transparent liquid

· Grade Standard: Industry grade

· Application: Used in Power station, Electronic product, Fertilizer etc.


Melting point -77°C
Boiling point 36°C
density 0.91 g/mL at 20 °C
vapor density 1.2 (vs air)

Liquid, Single Sub-Boiling Quartz Distillation
storage temp. Store at RT.
pka 9.3(at 25℃)
color Colorless
explosive limit 27%
Water Solubility

Miscible with water.
Merck 14,494
Stability: Stable. Incompatible with copper, copper alloys, acids, galvanised iron, zinc, aluminium, bronze, dimethyl sulphate, mercury, alkali metals.
CAS DataBase Reference 1336-21-6(CAS DataBase Reference)
EPA Substance Registry System Ammonium hydroxide ((NH4)(OH))(1336-21-6)


· In industry, Ammonium Hydroxide is used as a precursor to some alkyl amines,

· In furniture-making, Ammonium Hydroxide is traditionally used to darken or stain wood containing tannic acid

· In food production, Ammonium Hydroxide is used as a leavening agent or acidity regulator

· Ammonium Hydroxide is used in the tobacco industry, and for the purposes of fishless cycling