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107-46-0

Name Hexamethyldisiloxane
CAS 107-46-0
EINECS(EC#) 203-492-7
Molecular Formula C6H18OSi2
MDL Number MFCD00008265
Molecular Weight 162.38
MOL File 107-46-0.mol

Chemical Properties

Appearance Colorless or yellowish transparent liquid
Melting point  −59 °C(lit.)
Boiling point  101 °C(lit.)
density  0.764 g/mL at 20 °C(lit.)
vapor density  >1 (vs air)
vapor pressure  20 hPa (20 °C)
refractive index  n20/D 1.377(lit.)
Fp  33 °F
storage temp.  Flammables area
solubility  0.00037g/l insoluble
form  liquid
color  Colorless to Almost colorless
Specific Gravity 0.76
Stability: Stable, but moisture sensitive. Highly flammable. Incompatible with strong acids, strong bases, oxidizing agents.
explosive limit 0.5-21.8%(V)
Water Solubility  insoluble
Hydrolytic Sensitivity 1: no significant reaction with aqueous systems
Detection Methods GC,NMR
BRN  1736258
Dielectric constant 2.2(20℃)
InChIKey UQEAIHBTYFGYIE-UHFFFAOYSA-N
LogP 5.06 at 20℃
Uses
The most popular precursor chemical is hexamethyldisiloxane (HMDS) which with the addition of helium and oxygen will produce a silica coating. it is used in a variety of consumer applications and can be used as intermediates in the production of silicone polymers.
CAS DataBase Reference 107-46-0(CAS DataBase Reference)
NIST Chemistry Reference Disiloxane, hexamethyl-(107-46-0)
Storage Precautions Moisture sensitive;Store under nitrogen
EPA Substance Registry System 107-46-0(EPA Substance)

Safety Data

Hazard Codes  F
Risk Statements 
R11:Highly Flammable.
Safety Statements 
S16:Keep away from sources of ignition-No smoking .
RIDADR  UN 1993 3/PG 2
WGK Germany  3
RTECS  JM9237000
10
Autoignition Temperature 340 °C
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29310095
Hazardous Substances Data 107-46-0(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: > 12160 mg/kg LD50 dermal Rat > 2000 mg/kg

Hazard Information

Material Safety Data Sheet(MSDS)

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