Acetals
Acetals
Acetals
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L A M B I O T T E & C I E S. A.<br />
E T H Y L A L<br />
ETHYLAL<br />
Molecular formula C 5<br />
H 12<br />
O 2<br />
Chemical structure CH 3<br />
-CH 2<br />
-O-CH 2<br />
-O-CH 2<br />
-CH 3<br />
Synonym<br />
Diethoxymethane (DEM)<br />
CAS N° 462-95-3<br />
EINECS N° 207-330-6<br />
Physical Properties<br />
Molecular weight 104.15<br />
Density (g/cm 3 ) 20°C 0.830<br />
Vapour density 3.6<br />
Boiling point (°C) 101 325 Pa 88<br />
Freezing point (°C) - 66<br />
Flash point (°C)<br />
Closed cup (Pensky-Martens) - 7<br />
Open cup (Cleveland) 6<br />
Vapour pressure (bar) 20°C (ASTM D 323 modified) 0.17<br />
Kinematic viscosity (10 -7 m 2 /s) 25°C 5.07<br />
Refractory index η 20 D 1.3725<br />
Explosion limits (Vol%)<br />
LEL : 2.1<br />
UEL : 20<br />
Autoignition temperature (°C) (ASTM E 659) 174<br />
Surface tension (mN/m) 25°C 21.62<br />
Evaporation rate compared to<br />
Diethyl ether (=1) 3<br />
(Following DIN 53170)<br />
Butyl acetate (=1) 0.25<br />
Solubility of the acetal in water (%) 6.33<br />
Solubility of water in the acetal (%) 1.21<br />
Solvent power<br />
Kauri-butanol index (ASTM D 1133-90) measured with gum 4938 92<br />
gum 4939 120<br />
Solubility parameters (MPa 1/2 )<br />
Hildebrand: Total δ 17.06<br />
Hansen: Dispersion δ d 14.87<br />
Polarity δ p 4.67<br />
Hydrogen bond δ h 6.95
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