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Name Magnesium hydroxide
CAS 1309-42-8
EINECS(EC#) 215-170-3
Molecular Formula H2MgO2
MDL Number MFCD00011104
Molecular Weight 58.32
MOL File 1309-42-8.mol

Chemical Properties

Appearance odourless white powder
Melting point  350 °C (lit.)
density  2,36 g/cm3
storage temp.  Room Temperature
solubility  5 M HCl: 0.1 M, clear, yellow
form  powder
color  White
Specific Gravity 2.36
Odor Odorless
PH 10.4(1 mM solution);10.4(10 mM solution);10.4(100 mM solution)
PH Range 9.5 - 10.5
Stability: Stable.
Water Solubility  0.9 mg/100 mL (18 ºC)
Sensitive  Air Sensitive
λmax λ: 260 nm Amax: 0.030
λ: 280 nm Amax: 0.025
Merck  14,5670
Solubility Product Constant (Ksp) pKsp: 11.25
Magnesium Hydroxide is an alkali that is a general purpose food additive. it exists as a white powder and has poor solubility in water and in alcohol. in frozen desserts it will increase the tendency for fat globules to clump, which results in an increase in dryness. it reacts with triglycerides in fatty acids to form soaps. it also functions as a drying agent in foods.
CAS DataBase Reference 1309-42-8(CAS DataBase Reference)
NIST Chemistry Reference Magnesium hydroxide(1309-42-8)
EPA Substance Registry System Magnesium hydroxide (Mg(OH)2) (1309-42-8)

Safety Data

Hazard Codes  Xi
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection .
WGK Germany  -
RTECS  OM3570000
HS Code  28161000
Safety Profile
Moderately toxic by intraperitoneal route. Human systemic effects: chlorine level changes, coma, somnolence. Incompatible with maleic anhydride, phosphorus. See also MAGNESIUM COMPOUNDS.
Hazardous Substances Data 1309-42-8(Hazardous Substances Data)
LD50 oral in rat: 8500mg/kg

Hazard Information

Material Safety Data Sheet(MSDS)

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