Magnesium nitrate Names IUPAC name Magnesium nitrate Other names Nitromagnesite (hexahydrate) Identifiers CAS Number 10377-60-3 Y 15750-45-5 (dihydrate) N 13446-18-9 (hexahydrate) N 3D model (JSmol) Interactive image ChEBI CHEBI:64736 N ChemSpider 23415 N ECHA InfoCard 100.030.739 EC Number 233-826-7 PubChem CID 25212 RTECS number OM3750000 (anhydrous) OM3756000 (hexahydrate) UNII 77CBG3UN78 N UN number 1474 InChI InChI=1S/Mg.2NO3/c;2*2-1(3)4/q+2;2*-1 N Key: YIXJRHPUWRPCBB-UHFFFAOYSA-N N InChI=1/Mg.2NO3/c;2*2-1(3)4/q+2;2*-1 Key: YIXJRHPUWRPCBB-UHFFFAOYAA SMILES [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Mg+2] Properties Chemical formula Mg(NO3)2 Molar mass 148.32 g/mol (anhydrous) 184.35 g/mol (dihydrate) 256.41 g/mol (hexahydr.) Appearance White crystalline solid Density 2.3 g/cm3 (anhydrous) 2.0256 g/cm3 (dihydrate) 1.464 g/cm3 (hexahydrate) Melting point 129 °C (264 °F; 402 K) (dihydrate) 88.9 °C (hexahydrate) Boiling point 330 °C (626 °F; 603 K) decomposes Solubility in water 125 g/100 mL Solubility moderately soluble in ethanol, ammonia Refractive index (nD) 1.34 (hexahydrate) Structure Crystal structure cubic Thermochemistry Specific heat capacity (C) 141.9 J/mol K Std molar entropy (So298) 164 J/mol K Std enthalpy of formation (ΔfHo298) -790.7 kJ/mol Gibbs free energy (ΔfG˚) -589.4 kJ/mol Hazards Main hazards Irritant Safety data sheet External MSDS R-phrases (outdated) R8, R36, R37, R38 S-phrases (outdated) S17, S26, S36 NFPA 704 0 1 0 OX Flash point Non-flammable Related compounds Other anions Magnesium sulfate Magnesium chloride Other cations Beryllium nitrate Calcium 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). N verify (what is YN ?)