Silicon Dioxide

Basic Information

View in Editor

CAS Number

91053-39-3

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

Density

0.32-0.38 g/mL at 25 °C<br />0.38 g/cm3 (loose weight)

SMILES

View in Editor

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChIKey

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

LogP

-0.61840

Topological Polar Surface Area

34.14 Å²

Hydrogen Bond Donor/Acceptor

0 / 2

Complexity

18.3

Safety Information

View Safety Information

GHS Hazard Pictograms

H319

H335

H373

Hazard Statement

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

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

Sensitiveness

对湿度敏感

Synonyms & References

English

DIATOMACEOUS EARTH
HYFLO
KIESELGUR
KIESELGEL
CELITE(R)
CHEMIZORB
BETZ 0247
BETZ 0251
KIESELGUHR
CELITE 281
CELITE 503
Celite?503
KIESELGUHR WHITE
RADIOLITE® HP 70
ACID RESISTANT BRICKS
EPU-133
EH-4360S
Calcined kieselguhr
Celatom FP 2
Celatom MW 25
Celite
Celite 219
Celite WPP
Damolin K
DiatoMite
Dicalite 200
Fossil fluor
FP 2
HP 200
HP 70
Infusorial earth, calcined

MDL Number

MFCD00132803

FAQ

What are the physical and chemical properties of Silicon Dioxide (CAS: 91053-39-3)?

Silicon Dioxide (CAS: 91053-39-3) is an amphoteric oxide with a crystalline form, often found as quartz or cristobalite. Its molecular weight is approximately 60.08 g/mol. It is insoluble in water and most organic solvents. Chemically, it is highly stable and reacts minimally with acids and bases. Silicon dioxide is a semiconductor at high purity, making it useful in electronic applications.

How is Silicon Dioxide (CAS: 91053-39-3) typically synthesized?

Silicon Dioxide is typically synthesized by heating silicon with oxygen, or by oxidizing silicon metal. Common methods include the direct oxidation of silicon in air or using water glass (sodium silicate) as a precursor. The process can also involve the hydrolysis of silicon tetrachloride, producing silica gel which can be dehydrated to form the solid form.

What industries use Silicon Dioxide (CAS: 91053-39-3)?

Silicon Dioxide is widely used in industries such as electronics, glass manufacturing, ceramics, and construction. In electronics, it is used as an insulator in semiconductors. In glass manufacturing, it acts as a flux and gives the glass its characteristic properties. It is also used in the production of optical fibers, pharmaceuticals, and as a filler in polymers.

What precautions should be taken when handling Silicon Dioxide (CAS: 91053-39-3)?

Silicon Dioxide is generally safe but can be dusty, which may pose inhalation risks. It should be handled in a well-ventilated area and with the use of personal protective equipment (PPE), such as safety goggles, gloves, and a dust mask. Spills should be cleaned up carefully using a vacuum cleaner or a damp mop to avoid dust generation. Always refer to the Safety Data Sheet (SDS) for detailed safety information.