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CS-W001157 4
Total: USD 88.00

1,1,1,3,5,7,7,7-Octamethyltetrasiloxane

  • CAS No. 16066-09-4

  • Cat. No. CS-0213526
  • Purity≥95%
  • MDL No.None

*For research and further manufacturing use only, not for direct human use.

1,1,1,3,5,7,7,7-Octamethyltetrasiloxane|CS-0213526

Structure of 16066-09-4

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General Information

  • CAS No. 16066-09-4
  • Cat. No. CS-0213526
  • Purity ≥95%
  • MDL No. None
  • Storage 4°C
  • Shipping Room temperature in continental US; may vary elsewhere.
  • Molecular Formula C₈H₂₆O₃Si₄
  • Molecular Weight 282.63
  • Synonym(s) 3H,5H-Octamethyltetrasiloxane
  • SMILES C[Si](C)(C)O[SiH](C)O[SiH](C)O[Si](C)(C)C

Description

1,1,1,3,5,7,7,7-Octamethyltetrasiloxane features a symmetric tetrameric siloxane backbone with eight methyl groups strategically positioned for enhanced hydrophobicity and thermal stability. This sterically shielded structure resists oxidation and moisture ingress, enabling reliable use in high-temperature applications and as a protective coating agent in advanced materials formulations.

Application

1,1,1,3,5,7,7,7-Octamethyltetrasiloxane serves as a stable, low-viscosity siloxane fluid that functions as a versatile silylating agent and chain terminator in organosilicon synthesis. Its eight methyl groups confer enhanced hydrophobicity and thermal stability, enabling efficient protection of alcohols and amines under mild conditions. The molecule’s bench-stable nature and ease of purification make it well-suited for scale-up applications in silicone polymer development and surface-modification chemistry.

Synthesis

  • Route1
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      1,1,1,3,5,7,7,7-Octamethyltetrasiloxane|CS-0213526
      16066-09-4
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      17478-13-6
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      17998-54-8

    References

    • US2595890 , ; C. A., , p. 7820 GB632954 , ; C. A., , p. 7866
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      75-54-7
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      107-46-0
    • ~27%
    • In-stock
      1,1,1,3,5,7,7,7-Octamethyltetrasiloxane|CS-0213526
      16066-09-4

    References

    • Scheim, U.; Ruehlmann, K.; Grosse-Ruyken, H.; Porzel, A. Journal of Organometallic Chemistry, 1986 , vol. 314, p. 39 - 46
  • Route3
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    • ~6%
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      1,1,1,3,5,7,7,7-Octamethyltetrasiloxane|CS-0213526
      16066-09-4
    • In-stock
      2,4,6,8-Tetramethylcyclotetrasiloxane|CS-0197068
      2370-88-9
    • null|null
      17478-13-6
    • 1,3,5,7,9-Pentamethylcyclopentasiloxane|CS-0738822
      6166-86-5

    References

    • J. Gen. Chem. USSR (Engl. Transl.), , vol. 61, # 6.2 p. 1378 - 1383,1257 - 1261

Safety Information

Download SDS
GHS Pictogram :
GHS No : GHS07
Signal Word : Warning
UN#: N/A
Class : N/A
Packing Group : N/A
Hazard Statements : H227-H315-H319
Precautionary Statements : P210-P264-P280-P302+P352-P370+P378-P501

Quality Control

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Computational Chemistry Data

  • TPSA   27.69
  • LogP   2.4066
  • H_Acceptors   3
  • H_Donors   0
  • Rotatable_Bonds   6

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  • 1,1,1,3,5,7,7,7-Octamethyltetrasiloxane sigma1,1,1,3,5,7,7,7-Octamethyltetrasiloxane manufacturer1,1,1,3,5,7,7,7-Octamethyltetrasiloxane price1,1,1,3,5,7,7,7-Octamethyltetrasiloxane structure1,1,1,3,5,7,7,7-Octamethyltetrasiloxane SDSbuy 1,1,1,3,5,7,7,7-Octamethyltetrasiloxane1,1,1,3,5,7,7,7-Octamethyltetrasiloxane supplier1,1,1,3,5,7,7,7-Octamethyltetrasiloxane uses1,1,1,3,5,7,7,7-Octamethyltetrasiloxane molecular weightprice of 1,1,1,3,5,7,7,7-Octamethyltetrasiloxane1,1,1,3,5,7,7,7-Octamethyltetrasiloxane chemical name formula of 1,1,1,3,5,7,7,7-Octamethyltetrasiloxane
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