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1,1,3,3-Tetramethyldisiloxane Structure

1,1,3,3-Tetramethyldisiloxane

Chemical Properties

Melting point <-78°C
Boiling point 70-71 °C (lit.)
Density  0.76 g/mL at 25 °C (lit.)
vapor pressure  250 hPa (20 °C)
refractive index  n20/D 1.370(lit.)
Flash point 14 °F
storage temp.  Store at <= 20°C.
solubility  soluble in Chloroform
pka 11.9[at 20 ℃]
form  liquid
Specific Gravity 0.757
color  colorless
explosive limit 0.8-62.9%(V)
Viscosity 0.7mm2/s
Water Solubility  DECOMPOSES
Sensitive  Moisture Sensitive
Hydrolytic Sensitivity 3: reacts with aqueous base
BRN  1733364
InChIKey NVYQDQZEMGUESH-UHFFFAOYSA-N
LogP -0.38-4.5 at 20-25℃
CAS DataBase Reference 3277-26-7(CAS DataBase Reference)
EWG's Food Scores 1
NIST Chemistry Reference ((CH3)2SiH)2O(3277-26-7)
EPA Substance Registry System Disiloxane, 1,1,3,3-tetramethyl- (3277-26-7)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H225
Precautionary statements P210-P233-P240-P241-P242-P243
Hazard Codes  F
Risk Statements  11-36/37/38-16
Safety Statements  16-26-36-9-33-29
RIDADR  UN 2924 3/PG 2
WGK Germany  3
RTECS  JN1000000
10-21
Autoignition Temperature 240 °C
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29310095
NFPA 704:
3
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