Medicinal grade light magnesium oxide CAS1309-48-4 use

Medicinal grade light magnesium oxide CAS1309-48-4 use light magnesium oxide is a white light loose amorphous powder
.
Odorless, odorless, non-toxic
.
Light weight takes up about three times the volume of heavy magnesium oxide
.
Exposure to air is very easy to absorb moisture and carbon dioxide, insoluble in water and alcohol, soluble in dilute acid to generate the corresponding magnesium salt solution
.
The specific gravity is 3.
58 (25), the melting point is 2852 °C, the boiling point is 3600 °C, it has the properties of being slightly soluble in pure water and organic solvents, soluble in acid or salt solution, molecular formula MgO, molecular weight 40.
31
.
It is used in metallurgy, smelting, high-grade magnesium bricks, refractory materials and moisturizing materials manufacturing
.
【Content determination】Take 0.
4g of this product, precision weighing, precision sulfuric acid titration solution (0.
5mol/L) 25ml dissolved, add 1 drop of methyl orange indicator solution, titrate with sodium hydroxide titration solution (1mol/L), and correct
the titration result with blank test.
According to the amount of sulfuric acid consumed, subtract the amount of sulfuric acid that should be consumed by the mixed calcium oxide (CaO), that is, the amount of sulfuric acid consumed by MgO in the test product is obtained
.
Each 1 ml of sulfate titration solution (0.
5 mol/L) is equivalent to 20.
15 mg of MgO or 28.
04 mg of CaO
.
【Category】Pharmaceutical excipients, fillers and pH adjusters, etc
.
This product is calculated according to the incandescent product, containing MgO shall not be less than 96.
5%.

【Properties】This product is white or off-white powder
.
This product is almost insoluble in water or ethanol; Dissolved
in dilute acid.
【Identification】The identification reaction of magnesium salt in the dilute hydrochloric acid solution of this product (General 0301).

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