Molecular Formula | H2MgO2 |
Molar Mass | 58.32 |
Density | 2,36 g/cm3 |
Melting Point | 350 °C (lit.) |
Boling Point | 100℃ at 760mmHg |
Water Solubility | 0.9 mg/100 mL (18 ºC) |
Solubility | Soluble in dilute acids. Practically insoluble in water |
Appearance | White powder |
Specific Gravity | 2.36 |
Color | White |
Odor | Odorless |
Solubility Product Constant(Ksp) | pKsp: 11.25 |
Maximum wavelength(λmax) | ['λ: 260 nm Amax: 0.030', , 'λ: 280 nm Amax: 0.025'] |
Merck | 14,5670 |
PH | 10.4(1 mM solution);10.4(10 mM solution);10.4(100 mM solution) |
Storage Condition | Room Temperature |
Stability | Stable. |
Sensitive | Air Sensitive |
MDL | MFCD00011104 |
Physical and Chemical Properties | Melting point 350°C water-soluble 0.9 mg/100 mL (18°C) |
Use | Used as an analytical reagent and also used in the pharmaceutical industry |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | 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 S24/25 - Avoid contact with skin and eyes. |
WGK Germany | - |
RTECS | OM3570000 |
FLUKA BRAND F CODES | 3-9 |
TSCA | Yes |
HS Code | 28161000 |
Toxicity | LD50 oral in rat: 8500mg/kg |
Raw Materials | Sodium carbonate Magnesium sulfate anhydrous Magnesium oxide |
Downstream Products | Magnesium hexafluorosilicate Magnesium bromide Magnesium peroxide |
White Crystal or powder. Soluble in dilute acid and ammonium salt solution, almost insoluble in water and alcohol. Easy to absorb carbon dioxide in the humid environment. When heated to 200 ° C. Or higher in an alkaline solution, it becomes a hexagonal crystal. Decomposition into magnesium oxide and water at 230 °c. Above 500 °c, water is lost to magnesium oxide. The aqueous solution is alkaline, pH 9.5~10.5.
pure brine (treated to remove sulfate, carbon dioxide, a small amount of boron and other impurities) was used as the raw material, and ammonia water was used as the precipitant to carry out the precipitation reaction in the reactor. Before the reaction, add a certain amount of crystal seed, fully stir, react at 40 ℃, add flocculant after the end of the reaction, after the precipitate is filtered, washed, dried and crushed, finished magnesium hydroxide was obtained. Alternatively, the reaction is carried out in the reactor from a magnesium oxide solution with a certain concentration of aqueous ammonia. The resultant was washed, settled, filtered, separated, dried, and pulverized to obtain magnesium hydroxide.
magnesium hydroxide is an excellent flame retardant for plastic and rubber products. In terms of environmental protection as a flue gas desulfurization agent, can replace the caustic soda and lime as a neutralizer of acid containing wastewater. Also used as oil additives, play a role in corrosion and desulfurization. In addition, can also be used in the electronics industry, medicine, sugar refining, as insulation materials and manufacturing other magnesium salt products.
woven packing lined with plastic bags, 25kg net weight per bag. Should be stored in a cool, dry warehouse. With inorganic acids and strong bases and deliquescent and other items Isolation storage. Protection against rain and moisture during transport. When loading and unloading should be light to prevent packaging damage. Fire can be suppressed with water.