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A4722631

Magnesium hydroxide , 95% , 1309-42-8

CAS NO.:1309-42-8

Empirical Formula: H2MgO2

Molecular Weight: 58.32

MDL number: MFCD00011104

EINECS: 215-170-3

Pack Size Price Stock Quantity
500g RMB39.20 In Stock
1kg RMB63.20 In Stock
2.5kg RMB119.20 In Stock
5kg RMB191.20 In Stock
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Update time: 2022-07-08

PRODUCT Properties

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
PH 10.4(1 mM solution);10.4(10 mM solution);10.4(100 mM solution)
Odor Odorless
PH Range 9.5 - 10.5
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
Stability: Stable.
InChIKey VTHJTEIRLNZDEV-UHFFFAOYSA-L
LogP -1.380 (est)

Description and Uses

A white, bulky powder. It dissolves in dilute acids, but is practically insoluble in water and in alcohol.

Suspensions of magnesium hydroxide in water (milk of magnesia) are used as an antacid to neutralize stomach acid, and a laxative. This may cause diarrhea and loss of potassium with concomitant muscle cramps. Magnesium hydroxide is also used as an antiperspirant armpit deodorant. Milk of magnesia is useful against “canker sores” (aphthous ulcer) when used topically. Milk of magnesia is sold for medical use to alleviate constipation, but also to relieve indigestion and heartburn.
Milk of magnesia is also used as a folk remedy, applied and massaged in (a few minutes before washing), to relieve symptoms of “seborrhea” and “dandruff”. It is also said to be used for seborrheic dermatitis, which is a drying and flaking of the skin similar to dandruff but often occurring on the face.
Magnesium hydroxide powder is used industrially as a nonhazardous alkali to neutralize acidic wastewaters. Solid magnesium hydroxide has also smoke suppressing and fire retarding properties. Common uses of magnesium hydroxide as a fire retardant include plastics, roofing, and coatings. Magnesium hydroxide is marketed as a slurry for use as a neutralizing agent in the treatment of acidic wastewaters.

Safety

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P261-P280a-P304+P340-P305+P351+P338-P405-P501a
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36-37/39-24/25
WGK Germany  -
RTECS  OM3570000
3-9
TSCA  Yes
HS Code  28161000
Toxicity LD50 oral in rat: 8500mg/kg

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