Back to Search
Silicon
CAS: 7440-21-3 | Si
2D Structure
3D Structure
Loading 3D structure...
Basic Information
CAS Registry Number:
7440-21-3
Molecular Formula:
Si
Molecular Weight:
28.086 g/mol
Names and Synonyms:
Silicon
Synonym
KTC
Synonym
Silicon
Synonym
Silicon element
Synonym
Sicomill Grade 2
Synonym
KDB 20
Synonym
Sicomill 4C-P
Synonym
Silgrain Standard
Synonym
SILSO
Synonym
Polysilicon
Synonym
HGH 600
Synonym
Metasilicon 325A
Synonym
Hexsil
Synonym
CZ-N Polished wafer
Synonym
SI 1059
Synonym
GKO 3516A
Synonym
KR 1
Synonym
KDB 10
Synonym
4FY
Synonym
Silgrain HQ
Synonym
Si(100) wafer
Synonym
Biosilicon
Synonym
Silgrain
Synonym
Silicon 100
Synonym
PHC 20
Synonym
KDB 0.5
Synonym
KDB 0.1
Synonym
Aldrich 267414-25G
Synonym
Sharp 80W
Synonym
FEB 450D
Synonym
JT 02
Synonym
SIE 23PB
Synonym
Sicomill E 4
Synonym
PSi-C 2
Synonym
ψ-C 2
Synonym
SIE 20PB
Synonym
KTC (element)
Synonym
Silicon 600
Synonym
SI 500443
Synonym
SI 500444
Synonym
KEF 100
Synonym
AgroSilicio
Synonym
Sili-K
Synonym
Si-S 10μm
Synonym
6PW-A1
Synonym
Silicon 200
Synonym
SI 500452
Synonym
a-Si 11
Synonym
a-Si 12
Synonym
a-Si 13
Synonym
M-Si 600
Synonym
Silgrain E-Si 400
Synonym
T 2
Synonym
T 2 (filler)
Synonym
SI 006031
Synonym
WFP 6005
Synonym
SAF 184
Synonym
SI 100
Synonym
KR-2
Synonym
Wafer World 119
Synonym
S 308
Synonym
Identifiers:
SMILES:
[Si]
InChI:
InChI=1S/Si
Spectral Data
NMR, IR, and Mass spectral data
1H NMR
13C NMR
Predicting NMR spectra...
10 ppm
9
8
7
6
5
4
3
2
1
0 ppm
| Shift (ppm) | Multiplicity | Integration | Assignment |
|---|
200 ppm
180
160
140
120
100
80
60
40
20
0 ppm
| Shift (ppm) | DEPT | Assignment |
|---|
Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.
All Properties
Comprehensive physical and chemical properties
Molecular
| Property | Value | Source |
|---|---|---|
| Molecular Weight | 28.086 g/mol | RDKit |
Exact
| Property | Value | Source |
|---|---|---|
| Exact Molecular Weight | 27.97692653 g/mol | RDKit |
Heavy
| Property | Value | Source |
|---|---|---|
| Heavy Atom Count | 1 count | RDKit |
Hydrogen
| Property | Value | Source |
|---|---|---|
| Hydrogen Bond Acceptors | 0 count | RDKit |
| Hydrogen Bond Donors | 0 count | RDKit |
Rotatable
| Property | Value | Source |
|---|---|---|
| Rotatable Bonds | 0 count | RDKit |
Aromatic
| Property | Value | Source |
|---|---|---|
| Aromatic Ring Count | 0 count | RDKit |
Topological
| Property | Value | Source |
|---|---|---|
| Topological Polar Surface Area | 0.0 Ų | RDKit |
Physical Properties
| Property | Value | Source |
|---|---|---|
| LogP | -0.3808 | RDKit |
| density | 2.33 g/cm³ | Legacy Database |
| cas-boiling-point | 2355 °C None | Legacy Database |
| cas-canonical-smile | [Si] None | Legacy Database |
| cas-density | 2.33 g/cm3 @ Temp: 25 °C None | Legacy Database |
| cas-inchi | InChI=1S/Si None | Legacy Database |
| cas-inchi-key | InChIKey=XUIMIQQOPSSXEZ-UHFFFAOYSA-N None | Legacy Database |
| cas-melting-point | 1410 °C None | Legacy Database |
| cas-name | Silicon None | Legacy Database |
| molecular_mass | 28.09 g/mol | Legacy Database |
Molar
| Property | Value | Source |
|---|---|---|
| Molar Refractivity | 5.754 | RDKit |