For research and development scientists and product formulators, understanding the intrinsic properties of chemical compounds is key to unlocking their full potential. Pentamethyldisiloxane (CAS 1438-82-0) is a prominent organosilicon compound with distinct chemical characteristics that make it a valuable asset in various synthetic processes. This article delves into the chemical properties of Pentamethyldisiloxane and explores its diverse applications in synthesis, highlighting why it's a compound worth considering from a reliable supplier.

Understanding the Chemical Profile of Pentamethyldisiloxane

Pentamethyldisiloxane, with its CAS number 1438-82-0, is characterized by its chemical formula C5H16OSi2 and a molecular weight of 148.35. The defining feature of this molecule is the presence of a Si-H bond, which is highly reactive and central to its utility in hydrosilylation reactions. Its physical properties include being a clear, colorless liquid with a relatively low boiling point of 86°C and a density of 0.760 g/mL at 20°C. Notably, it is sensitive to moisture, which means careful handling and storage are required to maintain its integrity. This sensitivity often necessitates packaging under nitrogen or in tightly sealed containers, a practice our Chinese manufacturer adheres to rigorously.

Key Chemical Properties and Reactivity

  • Si-H Bond Reactivity: The most significant chemical property is the presence of a reactive silicon-hydride (Si-H) bond. This bond readily participates in hydrosilylation reactions, where it adds across unsaturated bonds (e.g., alkenes, alkynes) in the presence of a catalyst, forming new C-Si bonds. This is a cornerstone of its use in organic synthesis.
  • Moisture Sensitivity: Pentamethyldisiloxane can hydrolyze in the presence of moisture, especially under acidic or basic conditions, leading to the formation of silanol groups and ultimately siloxanes. Proper storage is therefore critical.
  • Thermal Stability: While generally stable under normal conditions, its thermal decomposition products should be considered in high-temperature applications.
  • Solubility: It is typically miscible with many organic solvents but immiscible with water, a common trait for organosilicon compounds.

Applications in Chemical Synthesis

The reactivity of the Si-H bond makes Pentamethyldisiloxane an indispensable reagent for a multitude of synthetic transformations:

  • Hydrosilylation: This is its primary application. It's used to introduce silicon-containing functionalities into organic molecules, creating precursors for advanced materials, pharmaceuticals, and agrochemicals. This process allows for the controlled functionalization of complex organic structures.
  • Silicone Polymer Modification: It serves as a monomer or reactive intermediate in the synthesis and modification of silicone polymers, allowing for the tailoring of polymer properties such as flexibility, thermal resistance, and surface activity.
  • Surface Functionalization: Pentamethyldisiloxane can be used to modify the surface properties of various materials, imparting hydrophobicity or specific chemical reactivity.

Sourcing Pentamethyldisiloxane: A Procurement Perspective

For R&D scientists and formulators looking to buy Pentamethyldisiloxane, partnering with a reliable manufacturer like us, based in China, ensures you receive a high-quality product with consistent specifications. When inquiring about Pentamethyldisiloxane price or availability, be sure to confirm the CAS number (1438-82-0), purity levels, and recommended storage conditions. Understanding these details will help you integrate this versatile chemical into your synthesis projects effectively. We are a dedicated supplier committed to supporting your research and manufacturing needs with competitively priced, high-purity Pentamethyldisiloxane.

We encourage you to reach out to our sales team to discuss your specific requirements for Pentamethyldisiloxane. As your trusted supplier, we are ready to provide the materials and support you need for your groundbreaking chemical synthesis work.