Back Magnesiumhidroksied Afrikaans هيدروكسيد المغنيسيوم Arabic منیزیوم هیدروکسید AZB Hidròxid de magnesi Catalan Hydroxid hořečnatý Czech Magnesiwm hydrocsid Welsh Magnesiumhydroxid Danish Magnesiumhydroxid German Υδροξείδιο του μαγνησίου Greek Magnezia hidroksido Esperanto

Magnesium hydroxide

Magnesium hydroxide
Magnesium hydroxide
Magnesium hydroxide
Names
IUPAC name
Magnesium hydroxide
Other names
  • Magnesium dihydroxide
  • Milk of magnesia
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.013.792 Edit this at Wikidata
EC Number
  • 215-170-3
E number E528 (acidity regulators, ...)
485572
KEGG
RTECS number
  • OM3570000
UNII
  • InChI=1S/Mg.2H2O/h;2*1H2/q+2;;/p-2 checkY
    Key: VTHJTEIRLNZDEV-UHFFFAOYSA-L checkY
  • InChI=1/Mg.2H2O/h;2*1H2/q+2;;/p-2
    Key: VTHJTEIRLNZDEV-NUQVWONBAW
  • [Mg+2].[OH-].[OH-]
Properties
Mg(OH)2
Molar mass 58.3197 g/mol
Appearance White solid
Odor Odorless
Density 2.3446 g/cm3
Melting point 350 °C (662 °F; 623 K) decomposes
  • 0.00064 g/100 mL (25 °C)
  • 0.004 g/100 mL (100 °C)
5.61×10−12
−22.1×10−6 cm3/mol
1.559[1]
Structure
Hexagonal, hP3[2]
P3m1 No. 164
a = 0.312 nm, c = 0.473 nm
Thermochemistry
77.03 J/mol·K
64 J·mol−1·K−1[3]
−924.7 kJ·mol−1[3]
−833.7 kJ/mol
Pharmacology
A02AA04 (WHO) G04BX01 (WHO)
Hazards
GHS labelling:
GHS07: Exclamation mark[4]
Warning[4]
H315, H319, H335[4]
P261, P280, P304+P340, P305+P351+P338, P405, P501[4]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
8500 mg/kg (rat, oral)
Safety data sheet (SDS) External MSDS
Related compounds
Other anions
 Magnesium oxide
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Magnesium hydroxide is an inorganic compound with the chemical formula Mg(OH)2. It occurs in nature as the mineral brucite. It is a white solid with low solubility in water (Ksp = 5.61×10−12).[5] Magnesium hydroxide is a common component of antacids, such as milk of magnesia.

  1. ^ Patnaik, Pradyot (2003). Handbook of inorganic chemicals. New York: McGraw-Hill. ISBN 0-07-049439-8. OCLC 50252041.
  2. ^ Toshiaki Enoki and Ikuji Tsujikawa (1975). "Magnetic Behaviours of a Random Magnet, NipMg(1−p)(OH)2". J. Phys. Soc. Jpn. 39 (2): 317–323. Bibcode:1975JPSJ...39..317E. doi:10.1143/JPSJ.39.317.
  3. ^ a b Zumdahl, Steven S. (2009). Chemical Principles (6th ed.). Houghton Mifflin Company. p. A22. ISBN 978-0-618-94690-7.
  4. ^ a b c d "Magnesium Hydroxide". American Elements. Retrieved May 9, 2019.
  5. ^ Handbook of Chemistry and Physics (76th ed.). CRC Press. 12 March 1996. ISBN 0849305969.

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