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Molecule
Octamethylcyclotetrasiloxane
CAS: 556-67-2 · C8H24O4Si4
2D Structure
3D Structure
Loading 3D structure...
Basic Information
- CAS Registry Number
- 556-67-2
- Molecular Formula
- C8H24O4Si4
- Molecular Mass
- 296.62 g/mol
Identifiers
CAS Registry Number
556-67-2
SMILES
C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
InChI Key
HMMGMWAXVFQUOA-UHFFFAOYSA-N
InChI
InChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3
Names and Synonyms
- Octamethylcyclotetrasiloxane Common Name
- Cyclotetrasiloxane, 2,2,4,4,6,6,8,8-octamethyl- Synonym
- Cyclotetrasiloxane, octamethyl- Synonym
- 2,2,4,4,6,6,8,8-Octamethylcyclotetrasiloxane Synonym
- Octamethylcyclotetrasiloxane Synonym
- NUC Silicone VS 7207 Synonym
- Union Carbide 7207 Synonym
- SF 1173 Synonym
- UC 7207 Synonym
- VS 7207 Synonym
- Cyclic dimethylsiloxane tetramer Synonym
- KF 994 Synonym
- SH 344 Synonym
- Abil K 4 Synonym
- Octamethylcyclotetrasiloxanes Synonym
- Silbione V 2 Synonym
- Dow Corning 244 Synonym
- Dow Corning 344 Synonym
- Volasil 244 Synonym
- DC 344 Synonym
- Mirasil CM 4 Synonym
- TSF 404 Synonym
- LS 8620 Synonym
- D 4 Synonym
- Dabco DC 5258 Synonym
- DC 5258 Synonym
- Tetracyclomethicone Synonym
- Y 7175 Synonym
- NSC 345674 Synonym
- SH 244 Synonym
- Silbione 70045V2 Synonym
- DC 244 Synonym
- Dow Corning 244 Fluid Synonym
- DWQ 110 Synonym
- DWQ 120 Synonym
- PMX 0110 Synonym
- XF 3803 Synonym
- YF 393 Synonym
- ZBH 270 Synonym
- SH 244 Fluid Synonym
- SH 30 Synonym
- Additive 8030 Synonym
- 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane Synonym
- L 6907 Synonym
All Properties
Comprehensive physical and chemical properties
| Property | Value | Source |
|---|---|---|
| Molecular Mass | 296.62 g/mol | CAS Common Chemistry |
| Density | 0.96 g/cm³ | CAS Common Chemistry |
| 0.9558 g/cm3 | CAS Common Chemistry | |
| Wikipedia Url | https://en.wikipedia.org/wiki/Octamethylcyclotetrasiloxane | CAS Common Chemistry |
| Boiling Point | 175 °C | CAS Common Chemistry |
| Canonical SMILES | O1[Si](O[Si](O[Si](O[Si]1(C)C)(C)C)(C)C)(C)C | CAS Common Chemistry |
| InChI | InChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3 | CAS Common Chemistry |
| InChI Key | InChIKey=HMMGMWAXVFQUOA-UHFFFAOYSA-N | CAS Common Chemistry |
| Melting Point | 17.5 °C | CAS Common Chemistry |
| Name | Octamethylcyclotetrasiloxane | CAS Common Chemistry |
| Heavy Atom Count | 16 | RDKit |
| Hydrogen Bond Acceptors | 4 | RDKit |
| Hydrogen Bond Donors | 0 | RDKit |
| Rotatable Bonds | 0 | RDKit |
| Aromatic Ring Count | 0 | RDKit |
| Topological Polar Surface Area | 36.92 Ų | RDKit |
| LogP | 2.8736000000000015 | RDKit |
| 2.8736 | RDKit | |
| 2.95 | chempirical lib | |
| Molar Refractivity | 74.26800000000004 cm³/mol | RDKit |
| Ring Count | 1 | RDKit |
| Formal Charge | 0 | RDKit |
| Fraction Csp3 | 1.0 | RDKit |
| Exact Mass | 296.07516536799994 g/mol | RDKit |
Spectral Data
NMR, IR, and Mass spectral data
Predicting NMR spectra...
10 ppm
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1
0 ppm
| Shift (ppm) | Multiplicity | Integration | Assignment |
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200 ppm
180
160
140
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20
0 ppm
| Shift (ppm) | DEPT | Assignment |
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Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.
External Resources
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MW = 296.62 g/mol; density = 0.960 g/mL. Edit any field — others recompute live.
