C2H4OEthylene Oxide


STEL: N/A (Short Term exposure Limit - 15mins)

TWA: 5ppm (Time Weighted Average - 8hrs)


Alarm Recomendations
Rising Latching Alarms For Line Safety Applications

First Alarm: Second Alarm: Third Alarm:
1ppm 5ppm Optional

Ethylene Oxide (C2H4O) MoleculeEthylene Oxide (C2H4O)

Ethylene oxide (C2H40) is a flammable, colourless gas at temperatures above 10.7 Degrees Centigrade C that smells like ether at toxic levels. C2H4Ois found in the production of solvents, antifreeze, textiles, detergents, adhesives, polyurethane foam, and pharmaceuticals. Smaller amounts are present in fumigants, sterilants for spices and cosmetics, as well as during hospital sterilisation of surgical equipment.

Ethylene oxide (C2H4O) is produced in large volumes and is primarily used as an intermediate in the production of several industrial chemicals, the most notable of which is ethylene glycol.

It is also used as a fumigant in certain agricultural products. As a poison gas that leaves no residue on items it contacts, pure ethylene oxide is also employed as a sterilant for medical equipment and supplies that cannot support conventional high temperature steam sterilisation. Examples are devices that incorporate electronic components, plastic packaging or plastic containers.  Ethylene Oxide gas infiltrates packages as well as products themselves to kill micro organisms that are left during production or packaging processes.

Unfortunately, Ethylene Oxide  possesses several physical and health hazards that merit special attention. EtO is both flammable and highly reactive. Acute exposures to Ethylene Oxide gas may result in respiratory irritation and lung injury, headache, nausea, vomiting, diarrhoea, shortness of breath, and cyanosis. Chronic exposure has been associated with the occurrence of cancer, reproductive effects, mutagenic changes, neurotoxicity, and sensitisation.

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