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

Name: 1,1,1,3,5,7,7,7-Octamethyltetrasiloxane
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CAS No. 16066-09-4
Cat. No. CS-0213526
Purity≥95%
MDL No.None

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Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

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

Structure of 16066-09-4

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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.

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

Computational Chemistry Data

TPSA 27.69
LogP 2.4066
H_Acceptors 3
H_Donors 0
Rotatable_Bonds 6

Safety Information

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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

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Key Words

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

CAS No. 16066-09-4

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