magnesium chloride

noun

: a bitter deliquescent salt MgCl₂ used especially as a source of magnesium metal

Examples of magnesium chloride in a Sentence

Recent Examples on the Web

Purple ice melter is a blend of sodium acetate, magnesium chloride, calcium chloride, potassium chloride, and a non-staining purple coloring. —Timothy Dale, The Spruce, 16 Feb. 2026

For those who live in colder climates, stocking up on magnesium chloride is a smart way to prepare for a salt shortage. —Olivia McIntosh, Martha Stewart, 8 Feb. 2026

Rock salt/sodium chloride loses its effectiveness at 15 degrees Fahrenheit (minus 9 Celsius), magnesium chloride at 5 F (minus 15 C) and calcium chloride at minus 20 degrees F (minus 29 C). —Steven Goldsmith, The Conversation, 27 Jan. 2026

Use products that contain magnesium chloride or calcium chloride for better results in colder temperatures. —Karen Brewer Grossman, Southern Living, 23 Jan. 2026

Word History

First Known Use

1866, in the meaning defined above

Rhymes for magnesium chloride

• dihydrochloride
• amiloride
• hexachloride
• hydrochloride
• oxychloride
• pentachloride
• tetrachloride
• bichloride
• dichloride
• perchloride
• trichloride
• boride

Kids Definition

magnesium chloride

noun

: a bitter salt that occurs dissolved in seawater and is used in producing magnesium metal

Medical Definition

magnesium chloride

noun

: a bitter crystalline salt MgCl₂ used especially to replenish body electrolytes