calcium nitrate
Calcium nitrate are inorganic compounds with the formula Ca(NO3)2(H2O)x. The anhydrous compound, which is rarely encountered, absorbs moisture from the air to give the tetrahydrate. Both anhydrous and hydrated forms are colourless salts. Hydrated calcium nitrate, also called Norgessalpeter (Norwegian salpeter), is mainly used as a component in fertilizers, but it has other applications. Nitrocalcite is the name for a mineral which is a hydrated calcium nitrate that forms as an efflorescence where manure contacts concrete or limestone in a dry environment as in stables or caverns. A variety of related salts are known including calcium ammonium nitrate decahydrate and calcium potassium nitrate decahydrate.
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Product Info
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| Names | |
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| Other names
Kalksalpeter, Norgessalpeter, nitrocalcite, Norwegian salpeter, lime nitrate
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| Identifiers | |
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3D model (JSmol)
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| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.030.289 |
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PubChem CID
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| UNII |
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| UN number | 1454 |
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CompTox Dashboard (EPA)
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| Properties | |
| 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) |
| anhydrous: 1212 g/L (20 °C) 2710 g/L (40 °C) tetrahydrate: |
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| 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 | 33.08 g/100g (anhydrous, 25 °C) |
| Acidity (pKa) | 6.0 |
| −45.9·10−6 cm3/mol | |
| Structure | |
| cubic (anhydrous) monoclinic (tetrahydrate) |
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| Hazards | |
| GHS labelling: | |
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| Danger | |
| H272, H302, H315, H319 | |
| P210, P220, P221, P264, P270, P280, P301+P312, P302+P352, P305+P351+P338, P310, P321, P330, P332+P313, P337+P313, P362, P370+P378, P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
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LD50 (median dose)
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302 mg/kg (rat, oral) |
| Safety data sheet (SDS) | ICSC 1037 |
| Related compounds | |
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Other anions
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Calcium sulfate Calcium chloride |
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Other cations
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Magnesium nitrate Strontium nitrate Barium nitrate |
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