MAGNESIUM OXIDE, HEAVY
Magnesii oxidum ponderosum
MgO M r 40.30[1309-48-4]
DEFINITION
Content: 98.0 per cent to 100.5 per cent of MgO (ignited substance).
CHARACTERS
Appearance: fine, white or almost white powder.
Solubility: practically insoluble in water. It dissolves in dilute acids with at most slight effervescence.
IDENTIFICATION
A. Bulk density (2.9.34): minimum 0.25 g/mL.
B. Dissolve about 15 mg in 2 mL of dilute nitric acid R and neutralise with dilute sodium hydroxide solution R. The solution gives the reaction of magnesium (2.3.1).
C. Loss on ignition (see Tests).
【 Packing 】
25Kg Carton or Drum
【 Standard 】
USP/BP/EP/JP/CP
