Magnesium hydroxide Names IUPAC name Magnesium hydroxide Other names Milk of magnesia Identifiers CAS Number 1309 - 42 - 8 3D model (JSmol) Interactive image ChEBI CHEBI: 6637 ChEMBL ChEMBL1200718 ChemSpider 14107 ECHA InfoCard 100.013. 792 EC Number 215 - 170 - 3 E number E528 (acidity regulators,...) Gmelin Reference 485572 PubChem CID 14791 RTECS number OM3570000 UNII NBZ3QY004S InChI (show) InChI = 1S / Mg. 2H2O / h; 2 * 1H2 / q + 2;; / p - 2 Key: VTHJTEIRLNZDEV - UHFFFAOYSA - L InChI = 1 / Mg. 2H2O / h; 2 * 1H2 / q + 2;; / p - 2 Key: VTHJTEIRLNZDEV - NUQVWONBAW SMILES (show) (Mg + 2). (OH -). (OH -) Properties Chemical formula Mg (OH) Molar mass 58.3197 g / mol Appearance White solid Odor Odorless Density 2.3446 g / cm Melting point 350 ° C (662 ° F; 623 K) decomposes Solubility in water 0.00064 g / 100 mL (25 ° C) 0.004 g / 100 mL (100 ° C) Solubility product (K) 5.61 × 10 Magnetic susceptibility (χ) − 22.1 10 cm / mol Refractive index (n) 1.559 Structure Crystal structure Hexagonal, hP3 Space group P3m1 No. 164 Lattice constant a = 0.312 nm, c = 0.473 nm Thermochemistry Specific heat capacity (C) 77.03 J / mol K Std molar entropy (S) 64 J mol K Std enthalpy of formation (Δ H) − 924.7 kJ mol Gibbs free energy (Δ G  ̊) − 833.7 kJ / mol Pharmacology ATC code A02AA04 (WHO) G04BX01 (WHO) Hazards Safety data sheet External MSDS NFPA 704 0 0 Flash point Non-flammable Lethal dose or concentration (LD, LC): LD (median dose) 8500 mg / kg (rat, oral) Related compounds Other anions Magnesium oxide Other cations Beryllium hydroxide Calcium hydroxide Strontium hydroxide Barium hydroxide Except where otherwise noted, data are given for materials in their standard state (at 25 ° C (77 ° F), 100 kPa). N verify (what is?) Infobox references
what is the molar mass of magnesium hydroxide
58.3197 g / mol