E2638-C2H4
Rev 21.06.2021
Ethylene
Extremely flammable colorless gas. Widely used as a raw material in the polymer industry
and as a fruit ripener.
Chemical formula
H
2
C=CH
2
Molar weight
28
Relative gas density (to air)
0,97
Conversion
1 ppm= 1.15 mg/m
3
Boiling point
-103.7 °C
Low explosive limit (LEL), % vol. in air
2.7
Upper explosive limit (UEL), % vol. in air
36.0
Odor
Faint sweet odor when pure
Odor threshold
270...600 ppm, so the odor is not an adequate warning
property to prevent excessive exposure to ethylene
Hazards
Extremely flammable.
Gas/air mixtures are explosive.
Excessive exposure by inhalation may cause headaches,
dizziness, anesthesia, drowsiness, unconsciousness, or
other central nervous system effects.
Exposure
limits (ACGIH)
TWA
200 ppm
STEL
not established
Conversion of ppm to mg/m
3
is calculated for 25°C and 1 atm.
3
