CHEMICAL AND PHYSICAL PROPERTIES:
Characteristics : A white or almost white, free-flowing, granular Powder. Practically insoluble in water. It dissolves in Dilute mineral acids with slight effervescence.
Assay :    
Identification : Passes BP test  
Alkalinity (pH) : 9.2 ( 8 to 10)
Neutralising Capacity : 265 ml 0.1 N (NLT260 ml 0.1 M HCl )
Arsenic : 2 ppm (NMT 3 ppm)
Heavy Metals : Passes test ( NMT 30 ppm)
Sodium : 0.08 % (NMT 0.1 %)
Chlorides : Passes test (NMT 0.30%)
Sulphates : Passes test (NMT 0.70 %)
Loss on ignition : 43 % ( 40 % to 50 %)
Assay :    
Al2 O 3 : 17.1% (15.3 % to 18.7%)
MgO : 38.5% ( 36% to 44% )
Ratio Al2 O3 to MgO : 0.44 ( 0.40 to 0.45 )
 
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