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1,1,3,3-Tetramethyldisiloxane 3277-26-7 TMDSO
1,1,3,3-Tetramethyldisiloxane Manufacturer High quality Best price In stock factory CAS 3277-26-7
1,1,3,3-Tetramethyldisiloxane CAS 3277-26-7
TMDSO CAS 3277-26-7
Name: 1,1,3,3-Tetramethyldisiloxane
Synonyms: TETRAMETHYLDISILOXANE;(CH3)2HSiOSiH(CH3)2;1,1,3,3-tetramethyl-disiloxan;1,3-Dihydrotetramethyldisiloxane;Bis(dimethylsilyl) oxide;bis(dimethylsilyl)oxide;CT2030;Dimethylsilyl ether Dimethylsilyl ether; 1,3-Dihydrotetramethyldisiloxane; Disiloxane, 1,1,3,3-tetramethyl-; Bis(dimethylsilyl) ether;Disiloxane, 1,1,3,3-tetramethyl-; 1,1,3,3-tetramethyldisiloxane-1,3-diyl; 1,1,1,3-tetramethyldisiloxane; Tetramethyldisiloxane; TMDSO; Tetramethyldiydrodisiloxane
CAS: 3277-26-7
MF: C4H14OSi2
MW: 134.32
EINECS: 221-906-4
Product Categories: -;Silicone serier;Industrial/Fine Chemicals;Reduction;Si (Classes of Silicon Compounds);Tetramethyldisiloxane;Si-H Compounds;Siloxanes;Si-O Compounds;Synthetic Organic Chemistry;Hydrogensilanes Hydrogensiloxanes;Reducing Agents;Organometallic Reagents;Organosilicon
Mol File: 3277-26-7.mol
1,1,3,3-Tetramethyldisiloxane Structure
1,1,3,3-Tetramethyldisiloxane Chemical Properties
Appearance & Physical State Colorless liquid.
Density 0.76
Boiling Point 71ºC
Melting Point <-78ºC
Flash Point -20ºC
Refractive Index 1.369-1.371
Water Solubility DECOMPOSES
Stability Stable under normal temperatures and pressures.
Storage Condition 2-8ºC
Safety Info
RTECS JN1000000
Hazard Class 3
Safety Statements 16-26-36-9-33-29
HS Code 29310095
Melting point <-78°C
Boiling point 70-71 °C(lit.)
density 0.76 g/mL at 25 °C(lit.)
vapor pressure 250 hPa (20 °C)
refractive index n20/D 1.370(lit.)
Fp 14 °F
storage temp. 2-8°C
form liquid
color colorless
Specific Gravity 0.757
explosive limit 0.8-62.9%(V)
Water Solubility DECOMPOSES
HS Code 29310095
MSDS Information
1,1,3,3-Tetramethyldisiloxane Usage And Synthesis
Description 1,1,3,3-Tetramethyldisiloxane is soluble in many organic solvents, such as aromatic hydrocarbon and petroleum hydrocarbons, and so on. This product is a kind of widely used organic silicon intermediates, and usually be used as organic silicon blocking agent. Due to containing reactive Si-H groups in the molecular structure, it can be used in the synthesis of copolymer macromolecule by hydrosilylation. The synthesis of copolymer macromolecule can be made into a series of reactive silicone oil.
Chemical Properties Colorless or yellowish transparent liquid
Uses 1. Synthesis of polysiloxane containing faculties end groups.
2. Can be used for the preparation of high performance organic silicone surfactants.
3. Applicable to the production of many products, such as addition silicon rubber, silica gel, Hydrogenpolysiloxane and plastic, resin modifier, dendrite polymer special additives, etc.
Uses 1, 1, 3, 3-Tetramethyldisiloxane is a kind of siloxane derivative, and can be used as a monomer for the preparation of silicone polymers or silicone resins. It is used as an intermediate for preparing other organosilicon compounds. It is also used in non-aqueous polymer preparation as well as a laboratory reagent. In organic synthesis, it finds an application as an effective reducing agent in platinum-catalyzed reduction of carboxamides to amines as well as in the Au/TiO2-catalyzed hydrosilylation of carbonyl compounds (e.g., reduction of aldehydes or ketones) relative to monohydrosilanes. It can also enable a direct bromination of carboxylic acids in the presence of indium bromide (InBr3) as catalyst.
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.]
References https://www.alfa.com/en/catalog/B23697/
http://www.organic-chemistry.org/chemicals/reductions/tetramethyldisiloxane-TMDSO.shtm
https://www.infona.pl/resource/bwmeta1.element.elsevier-722236cc-df38-37aa-bbed-029ec07d525f
1,1,3,3-Tetramethyldisiloxane Preparation Products And Raw materials
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