Calcium nitrate called as Norgessalpeter (Norwegian salpeter), 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.

Application

The fertilizer grade (15.5-0-0 + 19% Ca) is popular in the greenhouse and hydroponics trades; it contains ammonium nitrate and water, as the "double salt" {\displaystyle {\ce {5Ca(NO3)2.NH4NO3.10H2O} {\displaystyle {\ce {5Ca(NO3)2.NH4NO3.10H2O}. This is called calcium ammonium nitrate.

Technical Specification