Pentamethyldisiloxane

• CAS: 1438-82-0
• Catalog Number: ACM1438820-5
• Category: Main Products
• Molecular Weight: 148.35 g/mol
• Molecular Formula: C5H16OSi2
• Synonyms: Pentamethyldisiloxane; Pentamethyl-Disiloxan; Disiloxane,Pentamethyl-; Pentamethyldisiloxane 97+%; Trimethylsiloxydimethylsilane; 1,1,1,3,3-Pentamethyldisiloxane; (Trimethylsiloxy)Dimethylsilane; 1,1,1,3,3-Pentamethyl-Disiloxane; 1,1,1,3,3-Pentamethylpropanedisiloxane; 2,2,4-Trimethyl-3-Oxa-2,4-Disilapentane
• Canonical SMILES: C[Si](C)O[Si](C)(C)C
• InChI: InChI=1S/C5H15OSi2/c1-7(2)6-8(3,4)5/h1-5H3
• InChI Key: XUKFPAQLGOOCNJ-UHFFFAOYSA-N
• Boiling Point: 84.5 °C(760 mmHg)
• Flash Point: 4.9 °C
• Density: 0.758 g/mL
• Appearance: Colorless liquid
• Storage: Moisture Sensitive. Ambient temperatures.
• Complexity: 65.3
• Covalently-Bonded Unit Count: 1
• EC Number: 215-873-5
• Exact Mass: 147.066143g/mol
• Formal Charge: 0
• Hazard Statements: H225 Highly Flammable liquid and vapour.
• H-Bond Acceptor: 1
• H-Bond Donor: 0
• Heavy Atom Count: 8
• Monoisotopic Mass: 147.066143g/mol
• Packaging: 10 g; 100 g
• Precautionary Statements: P210 Keep away from heat/sparks/open flames/hot surfaces. - No smoking.
• Refractive Index: 1.373
• Rotatable Bond Count: 2
• Signal Word: Danger

Case Study

Application of Pentamethyldisiloxane in Flame-Retardant Coatings for Polyester Fabrics

Sun L, et al. International Journal of Biological Macromolecules, 2024, 259(1), 129121.

A recent study explored the development of a composite flame-retardant coating for polyester fabrics, incorporating pentamethyldisiloxane (PMDS), phosphites, urea, and sodium alginate. The coating's synthesis involved blending sodium alginate with phosphites and PMDS, utilizing a stepwise preparation process to ensure uniformity and pH stability. This formulation was further applied to polyester fabrics to improve flame retardancy.
Preparation process of coating agent: First, 10 g of sodium alginate was added to 190 g of distilled water and stirred to a paste as a thickener. Subsequently, 12.47 g of phosphorous acid was dissolved in 4.1 g of distilled water, and 8 g of sodium hydroxide was dissolved in an equal amount of distilled water to adjust the pH value of the solution to close to 7. Then, 8 g of pentamethyldisiloxane, 1.2 g of urea, 20 g of thickener and 10 g of water-based adhesive were added to the phosphorous acid solution in sequence, and mechanically stirred at room temperature for 60 minutes to obtain a flame retardant composite coating agent (HUSC).
Coating process: Use a scraper to evenly coat HUSC on one side of the polyester fabric and dry it in an oven at 120 ° C for 10 minutes. The other side of the fabric was treated in the same way. Then, the coated fabric was immersed in a 10 wt% calcium chloride aqueous solution for 30 minutes, and then dried in an oven at 80 ° C to constant weight. Finally, the prepared flame-retardant polyester fabric was named PF-HUSC.

Custom Reviews

August 27, 2023

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Useful organic synthesis intermediates
Pentamethyldisiloxane can provide a carrier for organic synthesis catalyst and improve the yield.

Custom Q&A

What is the molecular formula of Pentamethyldisiloxane?

The molecular formula of Pentamethyldisiloxane is C5H15OSi2.

What is the molecular weight of Pentamethyldisiloxane?

The molecular weight of Pentamethyldisiloxane is 147.34 g/mol.

What is the InChI of Pentamethyldisiloxane?

The InChI of Pentamethyldisiloxane is InChI=1S/C5H15OSi2/c1-7(2)6-8(3,4)5/h1-5H3.

What is the InChIKey of Pentamethyldisiloxane?

The InChIKey of Pentamethyldisiloxane is XUKFPAQLGOOCNJ-UHFFFAOYSA-N.

What is the canonical SMILES of Pentamethyldisiloxane?

The canonical SMILES of Pentamethyldisiloxane is C[Si](C)O[Si](C)(C)C.

What is the CAS number of Pentamethyldisiloxane?

The CAS number of Pentamethyldisiloxane is 1438-82-0.

What is the European Community (EC) number of Pentamethyldisiloxane?

The European Community (EC) number of Pentamethyldisiloxane is 215-873-5.

What is the DSSTox Substance ID of Pentamethyldisiloxane?

The DSSTox Substance ID of Pentamethyldisiloxane is DTXSID00883673.

What is the hydrogen bond acceptor count of Pentamethyldisiloxane?

The hydrogen bond acceptor count of Pentamethyldisiloxane is 1.

Is Pentamethyldisiloxane a canonicalized compound?

Yes, Pentamethyldisiloxane is a canonicalized compound.