Calcium Nitrate Tetrahydrate (Calcium Nitrogen Oxide) (Ca(NO3)2*4H2O)-Powder

Characteristic

Calcium nitrate, also called Norgessalpeter (Norwegian saltpeter), is an inorganic compound with the formula Ca(NO₃)₂. This colourless salt absorbs moisture from the air and is commonly found as a tetrahydrate.

Chemical formula: Ca(NO₃)₂

Molar mass:164.088 g/mol (anhydrous)   236.15 g/mol (tetrahydrate)

Appearance:colorless solid   hygroscopic

Density:2.504 g/cm³ (anhydrous)   1.896 g/cm3 (tetrahydrate)

Melting point:561 °C (1,042 °F; 834 K) (anhydrous)    42.7 °C (109 °F; 316 K) (tetrahydrate)

Boiling point:decomposes (anhydrous)   132 °C (270 °F; 405 K) (tetrahydrate)

Solubility in water: anhydrous: 1212 g/L (20 °C)   2710 g/L (40 °C)

                                tetrahydrate: 1050 g/L (0 °C)   1290 g/L (20 °C)   3630 g/L (100 °C)

Solubility:soluble in ammonia   almost insoluble in nitric acid

Solubility in ethanol：51.4 g/100 g (20 °C)   62.9 g/100 g (40 °C)

Solubility in methanol：134 g/100 g (10 °C)   144 g/100 g (40 °C)   158 g/100 g (60 °C)

Solubility in acetone：16.8 g/kg (20 °C)

Acidity (pKa)：6.0

Magnetic susceptibility (χ)：-45.9·10⁻⁶ cm³/mol

Crystal structure： cubic (anhydrous)   monoclinic (tetrahydrate)

Application

It is mainly used as a component in fertilizers but has other applications.