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1,1,3,3-Tetramethyldisiloxane (TMDSO)

Product Name: 1,1,3,3-Tetramethyldisiloxane (TMDSO)
CAS: 3277-26-7
Purity:
Appearance: Colorless or yellowish transparent liquid

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Product Details

Factory supply good quality 1,1,3,3-Tetramethyldisiloxane (TMDSO) 3277-26-7 with stock

Molecular Formula:C4H14OSi2
Molecular Weight:134.326
Appearance/Colour:Colorless or yellowish transparent liquid
Vapor Pressure:100.561mmHg at 25°C
Melting Point:<-78oC
Refractive Index:n20/D 1.370(lit.)
Boiling Point:71 °C
PKA:11.9[at 20 ℃]
Flash Point:-20 °C
PSA：9.23000
Density:0.76 g/cm³
LogP:0.96980

1,1,3,3-Tetramethyldisiloxane(Cas 3277-26-7) Usage

Flammability and Explosibility

Highlyflammable

Purification Methods

1,Possible impurity is 1,1,5,5-tetramethyl-3-trimethylsiloxytrisiloxane b 154-155o/733mm. Fractionate it, collect fractions boiling below 80o and re-fractionate it. Its purity can be analysed by alkaline hydrolysis and measuring the volume of H2 liberated followed by gravimetric estimation of silica in the hydrolysate. It is unchanged when stored in glass containers in the absence of moisture for 2-3 weeks. Small amounts of H2 are liberated on long storage. Care should be taken when opening a container due to pressure developed. [Speier et al. J Am Chem Soc 79 974 1958, Emeléus & Smythe J Chem Soc 609 1958, IR: Kriegsmann Z Anorg Chem 299 78 1959, Beilstein 4 IV 3991.]

InChI:InChI=1/C4H14OSi2/c1-6-5-7(2,3)4/h6H2,1-4H3