Magnesium chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates MgCl2(H2O)x. These salts are typical ionic halides, being highly soluble in water.
Molar mass：95.211 g/mol (anhydrous);203.31 g/mol (hexahydrate)
Appearance：white or colourless crystalline solid
Density：2.32 g/cm3 (anhydrous);1.569 g/cm3
Melting point：714 °C (1,317 °F; 987 K) 117 °C (243 °F; 390 K) (hexahydrate);on rapid heating: slow heating leads to decomposition from 300 °C (572 °F; 573 K)
Boiling point：1,412 °C (2,574 °F; 1,685 K)
Solubility in water：anhydrous 52.9 g/100 mL (0 °C);54.3 g/100 mL (20 °C);72.6 g/100 mL (100 °C)
hexahydrate:235 g/100 mL (20 °C)
Solubility：slightly soluble in acetone, pyridine
Solubility in ethanol:7.4 g/100 mL (30 °C)
Magnetic susceptibility (χ):−47.4·10−6 cm3/mol
Utilized in the polymerase chain reactions (PCR). Used for dust control, ice control, and road stabilization. Employed in a variety of applications such as fertilizer, mineral supplement for animals, waste water treatment, artificial seawater, textiles, paper, fireproofing agents, cements, and fire extinguishers. Used in several medicines and topical or skin related applications. Acts as a coagulant in the preparation of tofu from soy milk. Acts as an anaesthetic for cephalopods.