Silica | CAS No. 7631-86-9

Silica

Basic Information

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CAS Number

7631-86-9

Molecular Formula

O2Si

Molecular Weight

60.08 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Water Treatment Chemicals Coagulants and Flocculants Inorganic Coagulants

Basic Physical Properties

Melting Point

>1600 °C

Boiling Point

2230 °C

Density

1.21 g/mL at 25 °C

Flash Point

2230°C

Refractive Index

1.46

SMILES

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O=[Si]=O

InChI

InChI=1S/O2Si/c1-3-2

InChIKey

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

LogP

-0.6184000000000001

Topological Polar Surface Area

34.14 Å²

Hydrogen Bond Donor/Acceptor

0 / 2

Complexity

18.3

Safety Information

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GHS Hazard Pictograms

H373

Hazard Statement

H373 Causes damage to organs through prolonged or repeated exposure
Specific target organ toxicity, repeated exposure

Stability

Stable.

Sensitiveness

Hygroscopic

Synonyms & References

English

Amorphous silica
Silica Dioxide
Diatomaceous earth
Silicic anhydride
Silica gel desiccant
Silicon(IV) oxide
Silica Gel (Spherical, 60micro m)[for Flash Chromatography]
Silica gel 60
Silica Gel (Spherical, 100micro m)[for Column Chromatography]
2-Mercaptoethyl ethyl sulfide Silica (PhosphonicS SEM26)
3-Mercaptopropyl ethyl sulfide Silica (60+, high-cross linking) (PhosphonicS SPM36)
N-Acetyl-L-cysteine ethyl Silica (PhosphonicS SCYT1)
Neo BLUE,2-4mm
SBA-15 Molecular Sieve
Silica gel (blue)
Silicon dioxide
SILICON DIOXIDE WAFER
Silicon Dioxide, 70nm
SILICON DIOXIDE, AMORPHOUS, OCTAMETHYLCYCLOTETRASILOXANE TREATED
MOLECULAR SIEVE
Quartz sand
Silica gel
Silica gel, functionalized, diethylenetriaMine tetraacetate, 0.5 MMol
Silicon dioxide SiO2
Low Melting Point Glass Powder
Porous Silica
SBA-15
SBA-16
MCM-48
nanostructured silica
SYTON® HT-50

MDL Number

MFCD00149856

Customs Code

3802900090

FAQ

What is Silica (CAS: 7631-86-9)?

Silica, with the CAS number 7631-86-9, is a common inorganic compound composed primarily of silicon and oxygen. It exists in various forms, such as silicon dioxide (SiO₂), and is known for its high thermal stability, chemical inertness, and resistance to weathering. Silica is widely found in nature, including in sand, quartz, and minerals, and is used in numerous applications due to its versatile properties.

What are the main uses of Silica (CAS: 7631-86-9)?

Silica (CAS 7631-86-9) is used in pharmaceuticals as an excipient, in the manufacturing of glass and ceramics, in construction materials, and in food processing as a clarifying agent. It also serves as a filler in various products, including cosmetics and toothpaste. In research, silica is essential for producing high-purity materials and is used in chromatography and filtration processes.

Is Silica (CAS: 7631-86-9) safe?

Silica (CAS 7631-86-9) is generally considered safe when handled properly. However, inhalation of fine silica dust can cause respiratory issues such as silicosis. It is important to follow safety standards, use appropriate protective equipment, and ensure proper ventilation to minimize health risks. Silica is non-toxic in its solid form but may react with strong acids or alkalis.

How should Silica (CAS: 7631-86-9) be stored?

Silica (CAS 7631-86-9) should be stored in a cool, dry place away from moisture and direct sunlight. It is typically kept in airtight containers to prevent contamination and maintain stability. Avoid exposure to high humidity or extreme temperatures, as these can affect its physical properties. Proper storage ensures its longevity and effectiveness in various applications.