Specification :

1. Magnesium Oxide food grade
CAS No.: 1309-48-4
Magnesium Oxide food grade Molecular Formula: MgO
Magnesium Oxide food grade Molecular Weight: 40.30
Magnesium Oxide food grade Physicochemical Properties:
White amorphous powder, odorless, smell-less and nontoxic. It is soluble in acid and ammonium salt solution, difficult to dissolve in water, and insoluble in alcohol. And can be changed into crystal by high-temperature burning above 1000 degree, and into dead-burned magnesium oxide or sintered magnesium oxide above 1500 degree . When meeting with carbon dioxide in the air, it shall produce basic magnesium carbonate.
Use: Used as food additive, color stabilizing agent and pH regulating agent or supplement of magnesium element in food, and also can be accelerating agent.
Processing Method: Soda Method, Ammonium Bicarbonate Method
Technical Specification:
Items Enterprise standard FAO/WHO
MgO % mix 96.5-100.5 96
Identification positive -
Appearance White powder -
Insoluble in Hcl Solution % max 0.1 0.05
loss on ignition % max 2 5
free alkali % max 2 -
Fe % max 0.05 -
soluble salts % max 2 1
CaO % max 0.5 1
heavy metals (Pb)% max 30.0ppm 30.0ppm
As % max 3.0ppm 3.0ppm

Packaging: 20KG/piece, plastic woven bag lined with polyethylene plastic bag. (Packed at the request of clients)
2. Magnesium Oxide Pharmaceutical Grade
Molecular Formula: MgO
Use: Used as anti-acid agent and laxatives in pharmaceutical industry; used for too much gastric acid and duodenal ulcer; and often used together with calcium carbonate, which easily causing astriction. Meanwhile it can be used as synthetic, intermediates and additives in other chemical industries.

Processing Method: Soda Method, Ammonium Bicarbonate Method

Technical Index:
Items CP2000 USP-24 Enterprise standard
MgO %e 96.5-100.5 96.0-100.5 96.0-100.5
Insoluble in HCl solution %d 0.1 0.1 0.1
LOI %d 5 10 2
Chloride %d 0.14 - 0.3
Sulphate %d 0.3 - 0.5
Fe %d 0.05 0.05 0.05
Carbonate quality - -
CaO %d 0.5 1.1 0.5
Mn %d 0.003 - -
As %d 0.0005 0.0005 0.0005
Heavy metals(Pb)%d 0.004 0.004 0.004
Accumulation density Heavy % - - 0.40g/ml
Light % - - 0.20g/ml