52630

Hexamethyldisiloxane

puriss., ≥98.5% (GC)

• Synonym(s): HMDSO
• Linear Formula: (CH₃)₃SiOSi(CH₃)₃
• CAS Number: 107-46-0
• Molecular Weight: 162.38
• Beilstein/REAXYS Number: 1736258
• EC Number: 203-492-7
• MDL number: MFCD00008265
• UNSPSC Code: 12352103
• PubChem Substance ID: 329757863
• NACRES: NA.22

Properties

• vapor density: >1 (vs air)
• Quality Level: 200
• grade: puriss.
• assay: ≥98.5% (GC)
• form: liquid
• refractive index: n20/D 1.377 (lit.); n20/D 1.377
• bp: 101 °C (lit.)
• mp: −59 °C (lit.)
• density: 0.764 g/mL at 20 °C (lit.)
• SMILES string: C[Si](C)(C)O[Si](C)(C)C
• InChI: 1S/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3
• InChI key: UQEAIHBTYFGYIE-UHFFFAOYSA-N

Description

General description

HMDSO(hexamethyldisiloxane) is an organosilicon compound. It is a non-toxic, environmentally friendly monomer. It can be used as a precursor to synthesize organosilicon thin films. It serves as a silylating agent for carboxylic acids and alcohols. Additionally, it is used in the preparation of aroyl chlorides. HMDSO is commonly used as a water-repellent.

Application

Hexamethyldisiloxane is used:

• As a modifying agent in the presence of ethanol/n-hexane solution for the preparation of hydrophobic and hydrophilic sodium silicate-based silica xerogels.
• To form the dielectric layers in the MIM(metal-insulator-metal) structure that is consisting of graphene quantum dots(GQDs) to prepare two-terminal NVM (non-volatile-memory) devices.

Features and Benefits

Hexamethyldisiloxanehas high thermal stability.

Other Notes

For a facile silylation of carboxylic acids; As chloride anion acceptor in the synthesis of sulphinic esters

Safety Information

• pictograms: GHS02,GHS09
• signalword: Danger
• hcodes: H225,H410
• pcodes: P210 - P233 - P240 - P241 - P242 - P273
• Hazard Classifications: Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 2
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 2
• flash_point_f: 21.2 °F - closed cup
• flash_point_c: -6 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter