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    1,1,3,3-Tetramethyldisiloxane

    1,1,3,3-Tetramethyldisiloxane
    1,1,3,3-Tetramethyldisiloxane structure
    CAS No.
    3277-26-7
    Chemical Name:
    1,1,3,3-Tetramethyldisiloxane
    Synonyms
    TMDO;TMDSO;CT2030;(Me2HSi)2O;SILOXANE HSI2;dimethylsilylether;Dimethylsilyl ethe;Dimethylsilyl ether;(CH3)2HSiOSiH(CH3)2;Tetramethyldisiloxan
    CBNumber:
    CB5355451
    Molecular Formula:
    C4H14OSi2
    Formula Weight:
    134.32
    MOL File:
    3277-26-7.mol

    1,1,3,3-Tetramethyldisiloxane Properties

    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.)
    Flash point:
    14 °F
    storage temp. 
    Store at <= 20°C.
    form 
    liquid
    color 
    colorless
    Specific Gravity
    0.757
    explosive limit
    0.8-62.9%(V)
    Water Solubility 
    DECOMPOSES
    Sensitive 
    Moisture Sensitive
    Hydrolytic Sensitivity
    3: reacts with aqueous base
    BRN 
    1733364
    InChIKey
    NVYQDQZEMGUESH-UHFFFAOYSA-N
    CAS DataBase Reference
    3277-26-7(CAS DataBase Reference)
    EWG's Food Scores
    1
    NIST Chemistry Reference
    ((CH3)2SiH)2O(3277-26-7)
    EPA Substance Registry System
    Disiloxane, 1,1,3,3-tetramethyl- (3277-26-7)
    SAFETY
    • Risk and Safety Statements
    Symbol(GHS) 
    GHS02
    Signal word  Danger
    Hazard statements  H225
    Precautionary statements  P210-P370+P378-P403+P235-P243-P403+P233
    Hazard Codes  F
    Risk Statements  11-36/37/38-16
    Safety Statements  16-26-36-9-33-29
    RIDADR  UN 2924 3/PG 2
    WGK Germany  3
    RTECS  JN1000000
    10-21
    Autoignition Temperature 240 °C
    TSCA  Yes
    HazardClass  3
    PackingGroup  II
    HS Code  29310095

    1,1,3,3-Tetramethyldisiloxane price More Price(11)

    Manufacturer Product number Product description CAS number Packaging Price Updated Buy
    Sigma-Aldrich 235733 1,1,3,3-Tetramethyldisiloxane 97% 3277-26-7 25g $28.2 2021-03-22 Buy
    Sigma-Aldrich 8.18414 1,1,3,3-Tetramethyldisiloxane for synthesis 3277-26-7 25 mL $76.68 2021-03-22 Buy
    Sigma-Aldrich 235733 1,1,3,3-Tetramethyldisiloxane 97% 3277-26-7 100g $85.5 2021-03-22 Buy
    TCI Chemical T1437 1,1,3,3-Tetramethyldisiloxane >97.0%(GC) 3277-26-7 25mL $21 2021-03-22 Buy
    TCI Chemical T1437 1,1,3,3-Tetramethyldisiloxane >97.0%(GC) 3277-26-7 250mL $119 2021-03-22 Buy

    1,1,3,3-Tetramethyldisiloxane Chemical Properties,Uses,Production

    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

    Raw materials

    Preparation Products


    1,1,3,3-Tetramethyldisiloxane Suppliers

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    View Lastest Price from 1,1,3,3-Tetramethyldisiloxane manufacturers

    Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
    2021-09-19 1,1,3,3-Tetramethyldisiloxane
    3277-26-7
    US $1.00 / Kg/Drum 1KG 99% Min. 20mt per month Wuhan KEMI-WORKS Chemical Co., Ltd.
    2021-09-07 1,1,3,3-Tetramethyldisiloxane
    3277-26-7
    US $10.00 / KG/Tin 1KG 99% 5000tons per month Wuhan Mulei New Material Technology Co. Ltd
    2021-08-26 1, 1, 3, 3-Tetramethyldisiloxane
    3277-26-7
    US $2.70 / Kg/Drum 10g 99% 10000kg Hebei Crovell Biotech Co Ltd

    1,1,3,3-Tetramethyldisiloxane Spectrum


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