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Magnesium hydroxide

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Identification
Molecular formula
Mg(OH)2
CAS number
1309-42-8
IUPAC name
magnesium;dihydroxide
State
State

At room temperature, magnesium hydroxide typically exists as a solid. It is relatively insoluble in water, which contributes to its stability in aqueous suspensions. This characteristic also makes it suitable for various applications where a solid state is advantageous.

Melting point (Celsius)
350.00
Melting point (Kelvin)
623.15
Boiling point (Celsius)
922.00
Boiling point (Kelvin)
1 195.15
General information
Molecular weight
58.32g/mol
Molar mass
58.3190g/mol
Density
2.3440g/cm3
Appearence

Magnesium hydroxide appears as a white solid, often found in the form of a powder. It does not have any distinct odor and is known for its inorganic nature. It is commonly suspended in water to form a milky liquid known as milk of magnesia, which is often used for medicinal purposes.

Comment on solubility

Solubility of Magnesium Dihydroxide

Magnesium dihydroxide, with the chemical formula Mg(OH)2, is a fascinating compound with unique solubility characteristics. Here are some key points to note:

  • Low Solubility in Water: Magnesium dihydroxide is known for its low aqueous solubility, approximately 0.0009 g/100 mL at 25°C. This property makes it less readily available in solution.
  • pH Dependency: The solubility of Mg(OH)2 can be influenced by the pH of the solution. It dissolves more readily in alkaline conditions, where the presence of hydroxide ions can increase its solubility.
  • Precipitation: In neutral or acidic environments, magnesium dihydroxide tends to precipitate. This characteristic is significant in various applications, including its role as an antacid.
  • Temperature Impact: Temperature can also affect solubility; higher temperatures can lead to increased solubility due to enhanced molecular activity.

To summarize, the solubility of magnesium dihydroxide is relatively low in standard conditions but can be modified through changes in pH and temperature. This highlights the importance of understanding solubility principles in the practical applications of this compound.

Interesting facts

Magnesium Dihydroxide: An Intriguing Compound

Magnesium dihydroxide, commonly known as *milk of magnesia*, is more than just a simple inorganic compound; it has a rich history and a variety of applications that showcase its significance in both science and daily life.

Key Facts About Magnesium Dihydroxide:

  • Neutralizing Agent: One of its primary roles is as an antacid, helping to neutralize stomach acid and alleviate heartburn or indigestion.
  • Hydration Assistance: Due to its ability to bind with excess hydrogen ions, magnesium dihydroxide plays a crucial role in restoring pH balance in various bodily functions.
  • Industrial Uses: Beyond healthcare, this compound is employed in the manufacturing of flame retardants, fertilizers, and even in wastewater treatment processes.
  • Environmental Impact: Magnesium dihydroxide is considered an environmentally friendly option compared to other hydroxides, minimizing the risk of harming ecosystems.
  • Research Potential: Scientists are continuously exploring its applications in drug delivery systems and as a potential candidate for carbon capture technologies.

As the famous chemist Marie Curie once said, “Nothing in life is to be feared, it is only to be understood.” This understanding of magnesium dihydroxide underscores its importance in both human health and environmental sustainability. Its unique properties make it a compound worth studying and appreciating in the grand tapestry of chemistry.

Synonyms
Nemalite
magnesium;dihydroxide
BRUCITE
1317-43-7
Magnesium hydroxide, 99%(KT)
Di-Gel
Haley's MO
Kisuma S 4
Hydrofy G 1.0
CCRIS 6159
EINECS 215-274-9
Milmag (TN)
S/G 84
Mint-o-mag (TN)
Magnesium Hydroxide Nanopowder
Magnesia, (Milk of) (USP)
Magnesium hydroxide (JAN/USP)
HY-B2218D
CS-B1709
MFCD00011104
Magnesium hydroxide, BioXtra, >=95%
Magnesium hydroxide, reagent grade, 95%
Magnesium hydroxide, 95.00-100.50%
CS-1101543
Magnesium hydroxide, Vetec(TM) reagent grade
D00731
Magnesium hydroxide, BioUltra, >=99.0% (KT)
Magnesium hydroxide, SAJ first grade, >=95.0%
Magnesium hydroxide, United States Pharmacopeia (USP) Reference Standard
Magnesium hydroxide, nanopowder, <100 nm particle size (laser PSA), 99.8% trace metals basis