Hexamethyldisiloxane

ALDRICH/469300 - viscosity 0.65 cSt (25 °C)

Synonym: Poly(dimethylsiloxane); HMDSO

CAS Number: 107-46-0
Empirical Formula (Hill Notation): C₆H₁₈OSi₂
Molecular Weight: 162.38
EC Number: 203-492-7
MDL Number: MFCD00008265
Linear Formula: (CH₃)₃SiOSi(CH₃)₃
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-469300-50ML	50 mL	$170.00 1/EA	Add To Favorites
45-469300-250ML	250 mL	$585.00 1/EA	Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

bp	101 °C (lit.)
density	0.764 g/mL at 20 °C (lit.)
InChI	1S/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3
InChI key	UQEAIHBTYFGYIE-UHFFFAOYSA-N
mp	−59 °C (lit.)
refractive index	n20/D 1.377 (lit.)
SMILES string	C[Si](C)(C)O[Si](C)(C)C
vapor density	>1 (vs air)
viscosity	0.65 cSt(25 °C)

Application:

Superhydrophobic Surface Coating: Studies the application of hexamethyldisiloxane coatings on fabric masks via plasma treatment to achieve superhydrophobic properties, enhancing the masks′ resistance to moisture (M Prado et al., 2022 ).
PECVD for Thin Film Coatings: Describes the use of hexamethyldisiloxane in plasma-enhanced chemical vapor deposition to create thin film coatings, exploring the effects of using extremely asymmetric capacitive RF discharge (Ž Gosar et al., 2020 ).
QCM-Based VOC Sensors: Hexamethyldisiloxane thin films are used as sensitive coatings for quartz crystal microbalance sensors, enhancing their capability to detect various volatile organic compounds (M Boutamine et al., 2014 ).
Hydrophobic-Hydrophilic Films: Explores the polymerization of hexamethyldisiloxane using atmospheric pressure plasma jets to create films with tailored hydrophobic and hydrophilic properties (M Bashir, S Bashir, 2015 ).

Packaging:

50, 250 mL in poly bottle

Symbol	GHS02,GHS09
Signal word	Danger
Hazard statements	H225 - H410
Precautionary statements	P210 - P273
Hazard Codes	F,N
Risk Statements	11-50/53
Safety Statements	16-61
RIDADR	UN1993 - class 3 - PG 2 - EHS - VP <= 110kPa - Flammable liquids
WGK Germany	WGK 2
Flash Point(F)	21.2 °F - closed cup
Flash Point(C)	-6 °C - closed cup

bp	101 °C (lit.)
mp	−59 °C (lit.)
Density	0.764 g/mL at 20 °C (lit.)
Refractive Index	n20/D 1.377 (lit.)
UNSPSC	12162002

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