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Magnesium hydroxide CAS#1309-42-8

Magnesium hydroxide CAS#1309-42-8

Basic Information

Long-Lasting Antacid & Laxative Action:Reacts slowly with stomach acid and retains water in the intestine, providing sustained relief from acidity and constipation.


Effective Flame Retardant & Smoke Suppressant:Decomposes endothermically at 332 °C, releasing water and magnesia to reduce heat and suppress smoke in fire-resistant applications.


Versatile Industrial Applications:Widely used in wastewater treatment, fuel additives, and as a raw material for producing various magnesium salts.


Stable Aqueous Suspension:Forms a uniform suspension in water with controlled solubility, ensuring reliable performance in pharmaceutical and industrial formulations.



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product description

Product Description of ‌Magnesium hydroxide CAS#1309-42-8

As the main component of Milk of Magnesia, magnesium hydroxide acts as a long-acting antacid and laxative. It also functions as an effective flame retardant and smoke suppressant, decomposing endothermically at 332 °C. Additionally, it is applied in wastewater treatment, fuel additives, and magnesium salt manufacturing.


Product Application of Magnesium hydroxide CAS#1309-42-8

Magnesium hydroxide is a high-performance flame retardant for plastics, rubber and coatings. It is widely used in flue gas desulfurization and acidic wastewater treatment as a replacement for caustic soda and lime. It also serves pharmaceuticals, food processing, electronics and chemical raw material production. Owing to its higher decomposition temperature, it is ideal for high-temperature processing of common polymers and flame-retardant paints.

Product Information

Parameters


Melting point350 °C (lit.)
density2,36 g/cm3
storage temp.Room Temperature
solubility5 M HCl: 0.1 M, clear, yellow
formpowder
colorWhite
Specific Gravity2.36
OdorOdorless
PH10.4(1 mM solution);10.4(10 mM solution);10.4(100 mM solution)
PH Range9.5 - 10.5
Water Solubility0.9 mg/100 mL (18 ºC)
λmaxλ: 260 nm Amax: 0.030
λ: 280 nm Amax: 0.025
SensitiveAir Sensitive
Merck145,670
Solubility Product Constant (Ksp)pKsp: 11.25
Stability:Stable.
Cosmetics Ingredients FunctionsABSORBENT
BUFFERING
InChIKeyVTHJTEIRLNZDEV-UHFFFAOYSA-L
LogP-1.380 (est)
CAS DataBase Reference1309-42-8(CAS DataBase Reference)
NIST Chemistry ReferenceMagnesium hydroxide(1309-42-8)
EPA Substance Registry SystemMagnesium hydroxide (Mg(OH)2) (1309-42-8)


Safety Information


Hazard CodesXi
Risk Statements36/37/38
Safety Statements26-36-37/39-24/25
WGK Germany-
RTECSOM3570000
TSCAYes
HS Code28161000
Hazardous Substances Data1309-42-8(Hazardous Substances Data)
ToxicityLD50 oral in rat: 8500mg/kg


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