4,4-dimethyl-2,2,6,6-tetraphenyl-3,5-dioxa-2,4,6-trisilaheptane

• ChemBase ID: 134580
• Molecular Formular: C28H32O2Si3
• Molecular Mass: 484.80898
• Monoisotopic Mass: 484.17100986
• SMILES: C[Si](C)(O[Si](C)(c1ccccc1)c1ccccc1)O[Si](C)(c1ccccc1)c1ccccc1
• Canonical SMILES: C[Si](O[Si](c1ccccc1)(c1ccccc1)C)(O[Si](c1ccccc1)(c1ccccc1)C)C
• InChI: InChI=1S/C28H32O2Si3/c1-31(2,29-32(3,25-17-9-5-10-18-25)26-19-11-6-12-20-26)30-33(4,27-21-13-7-14-22-27)28-23-15-8-16-24-28/h5-24H,1-4H3
• InChIKey: YFCVAZGXPLMNDG-UHFFFAOYSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: 4,4-dimethyl-2,2,6,6-tetraphenyl-3,5-dioxa-2,4,6-trisilaheptane
• IUPAC Traditional name: 4,4-dimethyl-2,2,6,6-tetraphenyl-3,5-dioxa-2,4,6-trisilaheptane
• Synonyms: Dow Corning® silicone diffusion pump fluids

Database IDs

• EC Number: 222-222-9; 223-620-5
• MDL Number: MFCD00053661
• PubChem SID: 162228856; 24868215
• PubChem CID: 19882

CALCULATED PROPERTIES

• H Acceptors: 2
• H Donor: 0
• LogD (pH = 5.5): 9.5238
• LogD (pH = 7.4): 9.5238
• Log P: 9.5238
• Molar Refractivity: 128.0492 cm^3
• Polarizability: 56.70265 Å^3
• Polar Surface Area: 18.46 Å^2
• Rotatable Bonds: 8
• Lipinski's Rule of Five: false

PROPERTIES

Physical Property

• Boiling Point: 180 °C/0.5 mmHg; 215 °C/0.5 mmHg; 245 °C/0.5 mmHg
• Flash Point: 101 °C; 113 °C; 213.8 °F; 235.4 °F
• Density: 1.07 g/mL at 25 °C; 1.09 g/mL at 25 °C
• Refractive Index: n20/D 1.52; n20/D 1.559; n20/D 1.58

Safety Information

• European Hazard Symbols: Irritant (Xi)
• German water hazard class: 3
• Risk Statements: 36
• Safety Statements: 26; 26-36
• GHS Pictograms: GHS07
• GHS Signal Word: Warning
• GHS Hazard statements: H319
• GHS Precautionary statements: P305 + P351 + P338

Product Information

• Linear Formula: [CH3Si(C6H5)2O]2Si(CH3)2

DETAILS

Sigma Aldrich - 445983

Application
Single component fluid for ultra high or ultra clean vacuums of 10-9 to 10-10 torr (untrapped) and 10-11 torr (trapped). Very low vapor pressure and back-streaming rate; resistant to oxidation, hydrolysis and radiation.
General description
For high vacuum and for fast pumping of large volumes of gas or vapor in production operations. Chemically and thermally inert fluids. General purpose for pumping large volumes of gas, vacuum range 10-5 to 10-7 torr. Also suitable for use in Aldrich swivel McLeod vacuum gauges.
Legal Information
Dow Corning is a registered trademark of The Dow Chemical Company or an affiliated company of Dow

Sigma Aldrich - 446548

Application
General purpose for pumping large volumes of gas, vacuum range 10-5 to 10-7 torr. Also suitable for use in Aldrich swivel McLeod vacuum gauges.
General description
For high vacuum and for fast pumping of large volumes of gas or vapor in production operations. Chemically and thermally inert fluids. General purpose for pumping large volumes of gas, vacuum range 10-5 to 10-7 torr. Also suitable for use in Aldrich swivel McLeod vacuum gauges.
Legal Information
Dow Corning is a registered trademark of The Dow Chemical Company or an affiliated company of Dow

Sigma Aldrich - 445975

Application
Single component fluid for high vacuums of 10-6 to 10-8 torr (untrapped) and 10-10 to 10-11 torr (trapped). Offers quick pumpdown.
General description
For high vacuum and for fast pumping of large volumes of gas or vapor in production operations. Chemically and thermally inert fluids. General purpose for pumping large volumes of gas, vacuum range 10-5 to 10-7 torr. Also suitable for use in Aldrich swivel McLeod vacuum gauges.
Legal Information
Dow Corning is a registered trademark of The Dow Chemical Company or an affiliated company of Dow