Silicon Dioxide Cas: 7631-86-9
| Catalog Number | XD92013 |
| Product Name | Silicon Dioxide |
| CAS | 7631-86-9 |
| Molecular Formula | O2Si |
| Molecular Weight | 60.08 |
| Storage Details | 2-8°C |
| Harmonized Tariff Code | 3802900090 |
Product Specification
| Appearance | White powder |
| Assay | 99% min |
| Melting point | >1600 °C(lit.) |
| Boiling point | >100 °C(lit.) |
| density | 2.2-2.6 g/mL at 25 °C |
| refractive index | 1.46 |
| Fp | 2230°C |
| solubility | Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides. |
| Specific Gravity | 2.2 |
| Specific Gravity | 0.97 |
| Specific Gravity | 1.29 |
| PH | 5-8 (100g/l, H2O, 20℃)(slurry) |
| Water Solubility | insoluble |
| Sensitive | Hygroscopic |
Silica is also known as silicone dioxide.Silica has a variety of applications: to control a product’s viscosity, add bulk, and reduce a formulation’s transparency. It can also function as an abrasive. In addition, it can act as a carrier for emollients, and may be used to improve a formulation’s skin feel. Spherical silica is porous and highly absorbent, with absorption capabilities roughly 1.5 times its weight. A typical claim associated with silica is oil control. It is found in sunscreens, scrubs, and wide range of other skin care, makeup, and hair care preparations. It has been successfully used in hypoallergenic and allergy-tested formulations.
Silica (SiO2) (RI: 1.48) is mined from deposits of diatomaceous soft chalk-like rock (keiselghur). This is an important group of extender pigments, which is used in a variety of particle sizes. They are used as a flatting agent to reduce gloss of clear coatings and to impart shear thinning flow properties to coatings. They are relatively expensive.
Silicon(IV) oxide, amorphous is used as carriers, processing aids, anti-caking and free-flow agents in animal feed. Defoamer applications such as paint, food, paper, textile and other industrial applications. Synthetic silicon dioxides are used as a rheology control agent in plastics. It is also used to manufacture adhesives, sealants and silicones.
Manufacture of glass, water glass, refractories, abrasives, ceramics, enamels; decolorizing and purifying oils, petroleum products, etc.; in scouring- and grinding-compounds, ferrosilicon, molds for castings; as anticaking and defoaming agent.
