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1,1,3,3-Tetramethyldisiloxane Basic information
1,1,3,3-Tetramethyldisiloxane Chemical 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. 2-8°C
  • form liquid
  • Specific Gravity0.757
  • color colorless
  • explosive limit0.8-62.9%(V)
  • Water Solubility DECOMPOSES
  • Sensitive Moisture Sensitive
  • Hydrolytic Sensitivity3: reacts with aqueous base
  • BRN 1733364
  • CAS DataBase Reference3277-26-7(CAS DataBase Reference)
  • NIST Chemistry Reference((CH3)2SiH)2O(3277-26-7)
  • EPA Substance Registry SystemDisiloxane, 1,1,3,3-tetramethyl- (3277-26-7)
Safety Information
  • 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 Temperature240 °C
  • TSCA Yes
  • HazardClass 3
  • PackingGroup II
  • HS Code 29310095
1,1,3,3-Tetramethyldisiloxane Usage And Synthesis
  • Description1,1,3,3-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 PropertiesColorless or yellowish transparent liquid
  • Uses1. 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.
  • Uses1, 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 Methods1,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
1,1,3,3-Tetramethyldisiloxane(3277-26-7)Related Product Information
  • Company Name:Hangzhou Earth Chemical Co., Ltd. Gold
  • Tel:13906719152 0571-82699306
  • Company Name:Wuhan Kemi-Works Chemical Co., Ltd Gold
  • Tel:027-85736489
  • Company Name:Shandong Wanda Organosilicon New Materials Co., Ltd. Gold
  • Tel:021-54177116
  • Company Name:Jiangxi New jiayi New Materials Co., Ltd. Gold
  • Tel:15988432077
  • Company Name:Shanghai Qianhe Biological Technology Co., Ltd. Gold
  • Tel:13621714589 021-58337595-
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