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Hexamethyldisiloxane Structure

Hexamethyldisiloxane

Chemical Properties

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.)
Flash point 33 °F
storage temp.  Store below +30°C.
solubility  0.00037g/l insoluble
form  liquid
Specific Gravity 0.76
color  Colorless to Almost colorless
explosive limit 0.5-21.8%(V)
Water Solubility  insoluble
Hydrolytic Sensitivity 1: no significant reaction with aqueous systems
BRN  1736258
Dielectric constant 2.2(20℃)
Stability Stable, but moisture sensitive. Highly flammable. Incompatible with strong acids, strong bases, oxidizing agents.
InChIKey UQEAIHBTYFGYIE-UHFFFAOYSA-N
LogP 5.06 at 20℃
CAS DataBase Reference 107-46-0(CAS DataBase Reference)
EWG's Food Scores 2
FDA UNII D7M4659BPU
NIST Chemistry Reference Disiloxane, hexamethyl-(107-46-0)
EPA Substance Registry System Hexamethyldisiloxane (107-46-0)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H225-H410
Precautionary statements P210-P273
Hazard Codes  F,N,T
Risk Statements  11-50/53-65-51/53-48/23/24/25-36/38-46-45
Safety Statements  16-61-62-45-26-53
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
NFPA 704:
4
2 1

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