Molecular Formula |
Mg2Si3O8,xH2O |
Category |
Antacid |
Storage Condition |
Store protected from moisture |
Application
Used as Antacid in Antacid Formulations. Also useful Antioxidant, Decolorizing Agent and industrial odor absorbent.
Sr. No. |
Test Parameters |
Specification / Limits |
1 |
Description |
A fine white, odorless powder, slightly hygroscopic. |
2 |
Solubility |
Practically insoluble in water and in ethanol (95%). |
3 |
Identification - A
B |
It gives the reaction of magnesium salts.
It gives the reaction of silicates. |
4 |
Alkalinity |
Not more than 1.0 ml of 0.1M HCl is required. |
5 |
Arsenic |
Not more than 4 ppm |
6 |
Heavy Metals |
Not more than 40 ppm |
7 |
Chloride |
Not more than 500 ppm |
8 |
Sulphate |
Not more than 0.5 % |
9 |
Water soluble Salt |
Not more than 30 mg |
10 |
Acid Absorption Cap. |
Not less than 100 ml 0.1M HCl acid per gm |
11 |
Loss on Ignition |
Between 17 % to 34 % |
12 |
Assay as MgO
Assay as SiO2 |
Not less than 29 % (Ignited basis)
Not less than 65 % (Ignited basis) |
Molecular Formula |
Mg2Si3O8,xH2O |
Molecular Weight |
260.86 gm/mol |
Storage Condition |
Preserve in tight container |
Application
Used as Antacid in Antacid Formulations. Also useful Antioxidant, Decolorizing Agent and industrial odor absorbent.
Sr. No. |
Test Parameters |
Specification / Limits |
1 |
Description |
Fine, white, odourless, tasteless powder, free from grittiness. |
2 |
Solubility |
Insoluble in water and alcohol is readily decomposed by mineral acids. |
3 |
Identification - A
B |
It gives the reaction of magnesium.
It gives the reaction of silicates. |
4 |
Water |
Between 17.0 % to 34.0 % |
5 |
Soluble salts |
Residue weight Not more than 38.0 mg (1.5 %) |
6 |
Chloride |
Not more than 0.055 % |
7 |
Sulphate |
Not more than 0.5 % |
8 |
Free Alkali |
Not more than 1.0 ml of 0.1 M HCl is required. |
9 |
Arsenic |
Not more than 8 ppm |
10 |
Heavy Metals |
Not more than 0.003 % |
11 |
Acid Consuming capacity |
Between 140 ml to 160 ml of 0.1N HCl is required |
12 |
Assay as MgO
Assay as SiO2 |
Not less than 20.0 % of MgO
Not less than 45.0 % of SiO2 |
13 |
Ratio of SiO2 to MgO |
Between 2.10 to 2.37 |
Molecular Formula |
Mg2Si3O8,xH2O |
Application
Used as Antacid in Antacid Formulations. Also useful Antioxidant, Decolorizing Agent and industrial odor absorbent.
Sr. No. |
Test Parameters |
Specification / Limits |
1 |
Description |
A fine white powder. |
2 |
Solubility |
Practically insoluble in water and in alcohol. |
3 |
Identification: (A)
(B) |
It gives the reaction of silicates.
It gives the reaction of magnesium. |
4 |
Alkalinity
(solution-S) |
Not more than 1.0 ml of 0.1M HCl is required. |
5 |
Water soluble Salts |
Not more than 30 mg. |
6 |
Chloride |
Not more than 500 ppm |
7 |
Sulphate |
Not more than 0.5 % |
8 |
Arsenic |
Not more than 4 ppm |
9 |
Heavy Metal |
Not more than 40 ppm |
10 |
Loss on Ignition |
Between 17 % to 34 % ignited at 900° |
11 |
Acid Absorbing Capacity |
Not less than 100 ml of 0.1M HCl acid per gm |
12 |
Assay as MgO
Assay as SiO2 |
Not less than 29 % of MgO (Ignited basis)
Not less than 65 % of SiO2 (Ignited basis) |