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Hexamethyldisiloxane (MM)

Chemical Name:Hexamethyldisiloxane
Product Category:Silicone IntermediateProduct
Structural Formula:107-46-0
CAS No.:107-46-0
Molecular Formula:C6H18OSi2
Molecular Weight:162.378

Hexamethyldisiloxane Description

Hexamethyldisiloxane(CAS 107-46-0) is an organosilicon compound with the chemical formula C6H18OSi2, a colorless transparent liquid, insoluble in water, soluble in most organic solvents, mainly used as a capping agent, cleaning agent, film release agent, organic synthesis intermediates, etc.

MM Silicone Intermediate can be used as a solvent and organic synthesis reagent, the molecule is the prototype of the silicone ether, and the polydimethyl The molecule is the prototype of silicone ether, similar to the monomer of polydimethylsiloxane.
Melting point-59°C
Boiling point101°C
Flash point-2°C
Refractive index1.377 (20°C)
Appearancecolorless transparent liquid
Critical pressure1.91MPa
Ignition temperature341°C
Saturated vapor pressure5.6kPa (25°C)
UsesThe most popular precursor chemical is hexamethyldisiloxane (HMDS) Mainly used as head-sealing agent, cleaning agent, release agent, organic synthesis intermediate, etc.
  • YES
Transportation & Safety info
  • UN No.: UN 1993
  • Transport hazard class(es) : 3
  • Packing group: II
  • Packed in iron drum/plastic drum, net weight 190kg/drum, or packed in ton drum, net weight 950kg/barrel or international standard container packaging.
  • Provided for free
Inventory items
  • 20 tons.

Packaging Specifications

Packaging Specifications
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Hexamethyldisiloxane: Guide

Hexamethyldisiloxane is an important silicone primary raw material, often used as a capping agent for silicone silicone oil production, or used in silicone rubber, pharmaceuticals, gas chromatography fixative, analytical reagents, water-repellent agents and cleaning agents for medical electronic components. The Si-O-Si bond in the molecular chain structure of hexamethyldisiloxane has a high chemical bonding energy (460.5kJ/mol), and the polysiloxanes made from it as a capping agent have good thermal and chemical stability.

Hexamethyldisiloxane is colorless transparent liquid. It is easily deliquescent, flammable, and has the danger of burning when it meets high heat, open flame and strong oxidizer. Boiling point 99.5℃. Flash point -1.1℃. Relative density (d2525) 0.7606, refractive index 1.3750, insoluble in water, soluble in a variety of organic solvents.
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