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 |
| Specific Gravity | 2.36 |
| color | White |
| Odor | Odorless |
| PH Range | 9.5 - 10.5 |
| PH | 10.4(1 mM solution);10.4(10 mM solution);10.4(100 mM solution) |
| 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) |
| 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) |
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 |
| F | 3-9 |
| TSCA | Yes |
| HS Code | 28161000 |
| Hazardous Substances Data | 1309-42-8(Hazardous Substances Data) |
| Toxicity | LD50 oral in rat: 8500mg/kg |
