Calcium nitrate |
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Other names | Kalksalpeter, nitrocalcite, Norwegian saltpeter, lime nitrate |
Identifiers |
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CAS number | 10124-37-5 |
PubChem | 24963 |
RTECS number | EW2985000 |
SMILES | [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O |
InChI=1/Ca.2NO3/c;2*2-1(3)4/q+2;2*-1 |
Properties |
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Molecular 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, 834 K, 1042 °F |
Boiling point | |
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 |
| -45.9·10−6 cm3/mol |
Structure |
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Crystal structure | cubic (anhydrous) monoclinic (tetrahydrate) |
Hazards |
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NFPA 704 | |
R-phrases | R22, R41 |
Flash point | Non-flammable |
Related compounds |
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Other anions | Calcium sulfate Calcium chloride |
Other cations | Magnesium nitrate Strontium nitrate Barium nitrate |
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |