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| 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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