Colloidal Silicon Dioxide IP

Molecular Formula : SiO2
Molecular Weight  : 60.1 gm/mol
Sr.No. Test Parameters Specification / Limits
1 Description A light, fine, white, amorphous powder.
2 Identification About 20 mg gives the Reaction of Silicates.
3 Solubility Practically insoluble in water and in Mineral acid Except Hydrofluoric acid. It dissolves in alkali on heating.
4 pH Between 3.5 to 5.5
5 Arsenic Not more than 8 ppm
6 Heavy Metals Not more than 25 ppm
7 Chloride Not more than 250 ppm
8 Loss on Ignition
(At 900°C for 2 hours)
Not more than 5.0 %
9 Assay as SiO2 at Ignited basis Not Less than 99.0 %

Colloidal Silicon Dioxide EP

Molecular Formula

:

SiO2

Molecular Weight 

:

60.1 gm/mol

Sr. No. Test Parameters Specification / Limits
1 Description A light, fine, white, amorphous powder.
2 Solubility Practically insoluble in water and in Mineral acid Except Hydrofluoric acid.It dissolve in alkali on heating.
3 pH Between 3.5 to 5.5
4 Chloride Not more than 250 ppm
5 Heavy Metal Not more than 25 ppm
6 Loss on Ignition
(At 900°C for 2 hours)
Not more than 5.0 %
7 Assay as SiO2 at Ignited basis Not Less than 99.0 %

Colloidal Silicon Dioxide USP

Molecular Formula

:

SiO2

Molecular Weight 

:

60.1 gm/mol

Sr.No. Test Parameters Specification / Limits
1 Description A light, fine, white, amorphous powder.
2 Solubility Practically insoluble in water and in Mineral acid Except Hydrofluoric acid. It dissolves in alkali on heating.
3 pH Between 3.5 to 5.5
4 Loss on Drying
(At 105°C for 2 hours)
NMT 2.5 %
5 Loss on Ignition
(At 900°C for 2 hours)
NMT 2.0 %
6 Arsenic NMT 8 ppm
7 Assay as SiO2 at Ignited basis NLT 99.0 %


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