Calcium nitrate

Calcium nitrate
Names
	Other names Kalksalpeter; Norgessalpeter; nitrocalcite; Norwegian salpeter; lime nitrate;
Identifiers
CAS Number	10124-37-5 ; 13477-34-4 (tetrahydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:64205;
ChEMBL	ChEMBL3183960;
ChemSpider	23336 ;
ECHA InfoCard	100.030.289
EC Number	233-332-1;
PubChem CID	24963;
RTECS number	EW2985000;
UNII	NF52F38N1N ; O8T8H4NBBR (tetrahydrate) ;
UN number	1454
CompTox Dashboard (EPA)	DTXSID1039719 ;
	InChI InChI=1S/Ca.2NO3/c;22-1(3)4/q+2;2-1 Key: ZCCIPPOKBCJFDN-UHFFFAOYSA-N ; InChI=1/Ca.2NO3/c;22-1(3)4/q+2;2-1 Key: ZCCIPPOKBCJFDN-UHFFFAOYAF;
	SMILES [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O;
Properties
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) (anhydrous); 42.7 °C (108.9 °F) (tetrahydrate);
Boiling point	decomposes (anhydrous); 132 °C (270 °F) (tetrahydrate);
Solubility in water	anhydrous: 1212 g/L (20 °C (68 °F)); 2710 g/L (40 °C (104 °F)); ; tetrahydrate: 1050 g/L (0 °C (32 °F)); 1290 g/L (20 °C (68 °F)); 3630 g/L (100 °C (212 °F)); ;
Solubility	soluble in ammonia; almost insoluble in nitric acid;
Solubility in ethanol	51.4 g/100 g (20 °C (68 °F)); 62.9 g/100 g (40 °C (104 °F));
Solubility in methanol	134 g/100 g (10 °C (50 °F)); 144 g/100 g (40 °C (104 °F)); 158 g/100 g (60 °C (140 °F));
Solubility in acetone	33.08 g/100g (anhydrous, 25 °C (77 °F))
Acidity (pKa)	6.0
Magnetic susceptibility (χ)	−45.9×10−6 cm3/mol
Structure
Crystal structure	cubic (anhydrous); monoclinic (tetrahydrate)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H272, H302, H315, H319
Precautionary statements	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)	2 0 1 OX
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	302 mg/kg (rat, oral)
Safety data sheet (SDS)	ICSC 1037
Related compounds
Other anions	Calcium sulfate; Calcium chloride;
Other cations	Magnesium nitrate; Strontium nitrate; Barium nitrate;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Calcium nitrate is an inorganic compound with the formula Ca(NO₃)₂. It forms hydrates Ca(NO₃)₂·xH₂O. 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.