ETHYLENE OXIDE (< 0.2% nitrogen)

UN Number: 1040 - CAS Number: 75-21-8

Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


UN number 1040
CAS number 75-21-8

Physical chemical data

Physical State (20°C) Gas
Density (kg/m3)
1.935 [Kg/m³] at a temperature of 20°C
Molar mass (g/mol) 44.05
Density of gas (kg/m3) 1.935
Boiling Point (°C) 10.8
Melting Point (°C) -112
Vapour Pressure (Pa)
150000 [Pa] at a temperature of 20°C
Ignition Temperature (°C) 440
Flash Point (°C) -18
Upper explosivity limit (UEL) (volume %) 100

Behaviour at sea

Additional data

Colour colourless
Odour sweet odour
Standard behavior classification GD

Transportation data

Transport mode Gas,Packaged
Ship type 1G
State liq.compr.gas
Temperature (°C) ambient
Pressure (Pa) under pressure
IMO class 2(2.3)

Reactivity data

Water Yes
Acid(s) Yes
Base(s) Yes
Metal(s) and alloys No
Static electricity Yes
Oxidizing agents No
Reducing agents No
Combustibles No
Organic substance No

GESAMP Hazard profile

Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 3 - Moderately high
Eye irritation/corrosivity (D2) 3 - Severely irritating, with irreversible corneal injury
Interference with coastal amenities (E2) GD - Gas/Dissolver
Effects on wildlife and bottom habitats (E3) 3 - Is highly acutely toxic; and/or is severely irritant or corrosive to skin or eyes; and/or is carcinogenic, mutagenic or reprotoxic; and/or is a floater or persistent floater with associated health effects

Human toxicity threshold

IDHL 800
ERPG-2 (ppm) 50
ERPG-3 (ppm) 500


Incident reports

Incident reports

No incident reports available

Emergency Response Guidebook

Emergency Response Guidebook

Guide number: 119P

See the guide or download the emergency response guidebook

At sea emergency guide

At sea emergency guide

Emergency schedule: 2-06


Emergency procedures


Avoid all sources of ignition (e.g. naked lights, unprotected light bulbs, electric handtools).

Spillage on deck

Stop leak if practicable. Let spilt liquid evaporate, but keep clear.

Spillage under deck

Provide adequate ventilation. Stop leak if practicable. Let spilt liquid evaporate, but keep clear.

Fire on deck

Use water spray, foam or dry chemical from as far away as practicable.
Keep adjacent receptacles cool with copious quantities of water. Remove undamaged cooled receptacles to a safe place.

Fire under deck

Batten down; use ship's fixed fire-fighting installation. Otherwise adopt action as for "On deck".

Special equipment to be carried

Protective clothing (gloves, boots, coveralls, headgear).
Self-contained breathing apparatus.
Spray nozzles.

Decision trees

Decision trees

No decision trees available

No additional data

last modified 2023-03-06T11:30:19+00:00

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