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Product: Magnesium oxide

traits:
White fine powder. Without odour. Preparation methods for different, there is light and heavy cent. In the visible and nearly ultraviolet light within the area of strong refraction. Dew buy air is easy to absorb water and carbon dioxide and gradually become alkali type magnesium carbonate, light a heavy faster, and water with magnesium hydroxide formation, a slightly alkaline reaction, saturated solution pH *0.3. Soluble in dilute acid, hardly soluble in water, because of the existence of the carbon dioxide and increase its solubility. Not soluble in alcohol. The relative density (d**4) 3.*8. Melting point ***2 ℃. Boiling point ***0 ℃.



Specification:
Total sulfur amount (S), more than 0.*2 %
Burning weightlessness, more than *0.0 %
Hydrochloric acid insoluble, more than 0.*3, %
Heavy metal (in Pb plan), more than 0.**5 %
Calcium (Ca), more than 0.*5 %
Water soluble content, more than 0.5 %
Chloride (Cl), more than 0.*2 %
Nitrate (NO3), more than 0.**5 %
The phosphate (PO4), more than 0.**1 %
Content (MgO style), % *9.9 ~ **0.1
Iron if flexion-extension (Fe) radiographs, more than 0.**5 %
Zinc (Zn, more than 0.*2) %
Barium (Ba), more than 0.**3 %
Sour and ammonia sediment, % more than 0.*5