Silicon Dioxide CAS#7631-86-9
Abundant Resource – Makes up about 60% of the Earth’s crust, ensuring wide availability.
Multiple Forms – Includes crystalline, synthetic, amorphous, and vitreous silica for versatile use.
Natural Occurrence – Found in sand, deserts, riverbeds, rocks, and minerals, silicon dioxide is easily sourced from various natural environments.
Customizable for Specialized Applications – Beyond its common forms, other synthetic silica types can be produced to meet specific technical or industrial requirements.
Silicon dioxide is a naturally abundant compound found nearly everywhere on Earth. It is one of the most important oxides, making up approximately 60% of the Earth’s crust, either as pure silica or combined with other metal oxides in silicates. It commonly occurs as sand along oceans, rivers, deserts, rocks, and minerals. Silicon dioxide exists in various structural forms, including polymorphic crystalline silica, synthetic quartz crystals, amorphous silica, and vitreous silica. Additionally, other forms of silica can be artificially synthesized for specialized industrial applications.
Product Name: | Silicon dioxide |
Synonyms: | SILICA GEL 60 PF254 FOR PREPARATIVE LAYE;LICHROSORB SI 100 (10 MYM) 10 G;TLC-SILICA GEL 60 GF254 MEAN PARTICLE SI;LICHROSORB SI 100 (10 MYM) 100 G;SEA SAND EXTRA PURE 5 KG;SILICA GEL 60 GF254 FOR THIN-LAYER CHROM;SILICA GEL 60 PF254 + 366 FOR PREPARATIV;SEA SAND EXTRA PURE 25 KG |
CAS: | 7631-86-9 |
MF: | O2Si |
MW: | 60.08 |
EINECS: | 231-545-4 |
Product Categories: | Inorganics;organofunctional catalyst support;Mesoporous Materials;Ceramic Science;Materials Science;Metal &;Nanomaterials;New Products for Materials Research and Engineering;molecular sieves;metal oxide;metals scavenging agent;Silica Gels;Siloxanes;7631-86-9 |
Mol File: | 7631-86-9.mol |
Silicon dioxide Chemical Properties
Melting point | >1600 °C(lit.) |
Boiling point | >100 °C(lit.) |
Density | 2.2-2.6 g/mL at 25 °C |
Bulk density | 200-800kg/m3 |
Vapor pressure | 13.3hPa at 1732℃ |
Refractive index | 1.46 |
Fp | 2230°C |
Storage temp | 2-8°C |
Solubility | Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides. |
Form | Suspension |
Pka | 6.65-9.8[at 20 ℃] |
Specific Gravity | 2.2 |
Color | White to yellow |
Odor | at 100.00?%. odorless |
PH | 5-8 (100g/l, H2O, 20℃)(slurry) |
Resistivity | 1∞10*20 (ρ/μΩ.cm) |
Water Solubility | insoluble |
Sensitive | Hygroscopic |
Hydrolytic Sensitivity | 6: forms irreversible hydrate |
Crystal Structure | Trigonal |
Merck | 14,8493 |
Exposure limits | NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3 |
Stability: | Stable. |
CAS DataBase Reference | 7631-86-9(CAS DataBase Reference) |
NIST Chemistry Reference | Silicon(iv) oxide(7631-86-9) |
IARC | 3 (Vol. Sup 7, 68) 1997 |
EPA Substance Registry System | Silica (7631-86-9) |
Silica, also known as silicon dioxide, has diverse applications in various formulations. It can be used to control viscosity, add bulk, and reduce transparency, as well as function as an abrasive. Silica also serves as a carrier for emollients and enhances the skin feel of products. Spherical silica is porous and highly absorbent, capable of absorbing about 1.5 times its own weight, making it effective for oil control. It is commonly included in sunscreens, scrubs, and a wide range of skincare, makeup, and hair care products, and is suitable for hypoallergenic and allergy-tested formulations.
