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  7. Pentamethyldisiloxane, 95%

Pentamethyldisiloxane, 95%

Catalog No. AAL1657706
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Catalog No. AAL1657706 Supplier Thermo Scientific Chemicals Supplier No. L1657706
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Description

CAS: 1438-82-0 | C5H15OSi2 | 147.344 g/mol

Pentamethyldisiloxane is used in the synthesis of siloxane-polyether copolymer surfactants. It is also used as source of trimethylsilyl functional group in organic synthesis.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Pentamethyldisiloxane is used in the synthesis of siloxane-polyether copolymer surfactants. It is also used as source of trimethylsilyl functional group in organic synthesis.

Solubility
Not miscible or difficult to mix in water.

Notes
It is sensitive to moisture. Keep container tightly closed in a dry and well-ventilated place. Store under dry inert gas. Incompatible with oxidizing agents.

Chemical Identifiers

CAS 1438-82-0
Molecular Formula C5H15OSi2
Molecular Weight (g/mol) 147.344
MDL Number MFCD00053658
InChI Key XUKFPAQLGOOCNJ-UHFFFAOYSA-N
Synonym pentamethyldisiloxane, disiloxane, pentamethyl, 1,1,1,3,3-pentamethyldisiloxane, dimethyl trimethylsilyloxy silicon, disiloxane, 1,1,1,3,3-pentamethyl, dimethyl trimethylsilyl oxy silyl, dimethylsilyl oxy trimethylsilane
PubChem CID 6327260
IUPAC Name dimethyl(trimethylsilyloxy)silicon
SMILES C[Si](C)O[Si](C)(C)C

Specifications

Boiling Point 86°C to 87°C
Quantity 5 g
UN Number UN1993
Beilstein 1734568
Flash Point −19°C (−2°F)
Solubility Information Not miscible or difficult to mix in water.
Formula Weight 148.35
Percent Purity 95%
Refractive Index 1.374
Sensitivity Moisture sensitive
Density 0.758
Chemical Name or Material Pentamethyldisiloxane
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Safety and Handling

Hazard Category H225
Hazard Statement GHS H Statement
H225
Highly flammable liquid and vapor.
Precautionary Statement P210-P233-P240-P241-P242-P243-P280-P303+P361+P353-P370+P378q-P501c
DOTInformation Transport Hazard Class: 3; Packing Group: II; Proper Shipping Name: FLAMMABLE LIQUIDS, N.O.S.
EINECSNumber 215-873-5
TSCA Yes
Recommended Storage Ambient temperatures

RUO – Research Use Only