CAS No.: 7631-86-9
Characteristics & Physical Properties
This product consists of white uniform irregular grains with silicon dioxide (SiO2) as its main component. It features high purity and high safety standards. Due to varying adsorption retention times for different substance components, it enables the effective separation and purification of complex mixtures.
Solubility & Structure: Insoluble in acids (except hydrofluoric acid), soluble in caustic alkali solutions. Compared with standard silica gel, it contains a higher concentration of surface hydroxyl groups, categorizing it as a high-purity reagent grade silica gel.
Technical Specifications & Data Matrix
| Item | Industrial Grade (普通型) | Reagent Grade (精制型) | Typical Values | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Type 1 | Type 2 | Type 3 | Type 4 | Type 1 | Type 2 | Type 3 | Type 4 | Reagent Grade Type 3 | |
| Specific surface area, m^2/g | > 450 | 380-550 | 300-450 | < 350 | > 450 | 380-550 | 300-450 | < 350 | 410 |
| Pore volume, mL/g | 0.35-0.50 | 0.6-0.8 | 0.8-1.0 | > 1.0 | 0.35-0.50 | 0.6-0.8 | 0.8-1.0 | > 1.0 | 0.9 |
| Chlorides (Cl), w/% | — | 0.02 | 0.008 | ||||||
| Iron (Fe), w/% | — | 0.02 | 0.0067 | ||||||
| pH (100g/L water suspension) | Negotiable | Negotiable | 6.7 | ||||||
| Loss on Heating, w/% | 5 | 5 | 2.2 | ||||||
| Size / um | Negotiable | Negotiable | 100-200 mesh | ||||||
| Qualified size ratio, w/% | 60 | 60 | 80 | ||||||
Core Applications & Uses
- Refinement of petroleum products
- Removal of aromatic hydrocarbon materials
- Separation and refinement of traditional Chinese herbal medicine components
- Preparation of high-purity chemical substances and fine reagents