Ethylene Oxide Information


Ethylene Oxide:

Other Names

Oxirane; Epoxyethane

Chemical Formula


CAS Number


Industry Uses

Disinfectant; Fumigant; Sterilization; Insecticide; Chemistry Laboratories

Health Risks

Irritation of eyes, skin, and mucous membranes; Central Nervous System Depression; Cancer

Vapor Pressure

1095 mmHg

Water Solubility



Very Flammable


Sweet, ether-like

Ethylene Oxide MSDS

What is Ethylene Oxide:

Ethylene Oxide is a cyclic ether and the simplest epoxide. At room temperature and standard pressure, it is a colorless and very flammable gas. It is a bactericidal, fungicidal, and sporicidal disinfectant, and is effective against most micro-organisms including viruses. For this reason, it is used in the sterilization of pharmaceutical and surgical materials. It is also used as a fumigant. Ethylene oxide is also used to make many consumer products as well as non-consumer chemicals. Some of these products include detergents, thickeners, solvents, plastics, and various organic chemicals. The vapors emitted by ethylene oxide are very toxic, but leave no residue on items it contacts. The odor is sweet (and often confused with diethyl ether), but by the time it can be smelled, the concentration levels are high enough to be toxic. Ethylene oxide is very flammable. It may react explosively even in the absence of air. If heated under pressure, it may explode.

Ethylene Oxide Exposure and Health Risks:

Ethylene oxide is a toxic gas that has short-term and long-term effects. Ethylene oxide is a strong irritant, greatly affecting the eyes, skin, and respiratory tract. It induces vomiting and nausea and can cause headaches. It can also cause depression of the central nervous system and kidney and reproductive damage. Ethylene oxide is carcinogenic, and chronic exposure has been linked to increased risk of leukemia, stomach cancer, pancreatic cancer, and non-Hodgkin lymphoma. Ethylene oxide is a mutagen and may cause genetic defects by attacking germ cells.


The table below summarizes the most-recent exposure limits.




Not Recommended

AEGL-1 (8 hrs)


80 ppm

AEGL-2 (10 min)


7.9 ppm

AEGL-2 (8 hrs)


360 ppm

AEGL-3 (10 min)


35 ppm

AEGL-3 (8 hrs)


<0.1 ppm

TWA (8 hrs)


5 ppm

C (10 min/day)


5 ppm

Short-Term Exposure (15 min)


1 ppm

TWA (8 hrs)



Measuring Ethylene Oxide:

Ethylene oxide concentration in the air can be measured in units of parts per million (ppm). We carry portable and fixed ethylene oxide monitors and kits, and all of our ethylene oxide products can be viewed HERE.

What type of component are you looking for?

Fixed Mount Handheld Dissolved Kits:  Replacement Sensors: Calibration Gas:  Rentals: 

All sensors require a yearly calibration to ensure your gas measurements are accurate and performing within manufacturer standards. This page is desiccated to the individual manufacturers we represent and their specific calibration procedures. 

**Calibration Service Request Form **

Calibration Costs:

Calibration costs do vary, see below to get an estimate: 

Calibration Fee: $150

Analyzer Calibration Fee: $300

PM Calibration Sensor Fee: $330

Genie Calibration Fee: $265

ATI Calibration Fee: $205

** note that prices are subject to change per labor and parts required.

Contact us for help choosing the right monitor for your application