Silicon Dioxide
■ Chemical Description
-- Silicon Dioxide
■ CAS No. 14808-60-7
■ Molecular and Structural Formula SiO2
■ Characteristics
--Light white powder; odorless and tasteless;
--Insoluble (HF except) acid and soluble in hot alkaline solution;
■ Specification
No |
Tests |
Specification |
|
HG2791-1996 |
USP28/NF23 |
||
1 |
pH |
-- |
4-8 |
2 |
Silica content (after burning)% |
≥96.0 |
≥99.0 |
3 |
Loss on drying% |
≤5.0 |
≤5.0 |
4 |
Loss on ignition% |
≤8.5 |
≤8.5 |
5 |
Heavy metals (as Pb)% |
≤0.003 |
-- |
6 |
Lead% |
≤0.001 |
-- |
7 |
Arsenic% |
≤0.0003 |
-- |
8 |
Soluble salt dissociation (as Na2SO4) content% |
≤4 |
-- |
9 |
Chloride% |
-- |
≤0.1 |
10 |
Sulfate% |
-- |
≤0.5 |
■ Application
--Used as disintegrating agents in tablets and oil adsorption in drugs
■ Packaging and Storage
--Packed in 25, 50 kg fiber or plastic drum, inner lined with PE bags;
--Stored in dry place at room temperature;
【Last】 【Next】 【Return】 |