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ETHYLENE OXIDE Structure

ETHYLENE OXIDE

Chemical Properties

Melting point −111 °C(lit.)
Boiling point 10.7 °C(lit.)
Density  0.882 g/mL at 25 °C(lit.)
vapor pressure  1095 mmHg at 20 °C
refractive index  n20/D 1.3597(lit.)
Flash point <-17.7℃
storage temp.  2-8°C
form  Colorless gas
Odor Sweet odor detectable at 257 to 690 ppm
Merck  3802
BRN  102378
Exposure limits TLV-TWA 1.8 mg/m3 (1 ppm) (ACGIH), 0.18 mg/m3 (0.1 ppm), 5 ppm/10 min (NIOSH).
Dielectric constant 14.0(-4℃)
InChIKey IAYPIBMASNFSPL-UHFFFAOYSA-N
LogP -0.30
CAS DataBase Reference 75-21-8(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS) ETHYLENE OXIDE--NLFG
FDA 21 CFR 176.180
EWG's Food Scores 8-10
NCI Dictionary of Cancer Terms ethylene oxide
FDA UNII JJH7GNN18P
Proposition 65 List Ethylene Oxide
IARC 1 (Vol. Sup 7, 60, 97, 100F) 2012
EPA Substance Registry System Ethylene oxide (75-21-8)
Pesticides Freedom of Information Act (FOIA) Ethylene oxide

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H220-H230-H280-H301+H331-H314-H335-H336-H340-H350-H360FD-H372
Precautionary statements P202-P210-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  F+,T,F
Risk Statements  45-46-12-23-36/37/38-39/23/24/25-23/24/25-11-67-20-36/37-19-6
Safety Statements  53-45-36/37-16-24/25-23-26
RIDADR  UN 2037 2.3
OEB C
OEL TWA: <0.1 ppm (0.18 mg/m3), Ceiling: 5 ppm (9 mg/m3) [10-min/day]
WGK Germany  2
RTECS  KX2450000
4.5-31
Autoignition Temperature 429 °C
DOT Classification 2.3, Hazard Zone D (Gas poisonous by inhalation)
HazardClass  2.3
HS Code  29101000
Hazardous Substances Data 75-21-8(Hazardous Substances Data)
Toxicity LD50 oral (rat) 72 mg/kg
LC50 inhal (rat) 800 ppm (1600 mg/m3)
PEL (OSHA) 1 ppm (2 mg/m3)
TLV-TWA (ACGIH) 1 ppm (2 mg/m3)
IDLA 800 ppm
NFPA 704:
4
3 3

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