Ethylene oxide
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CAS
75-21-8
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C2H4O
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RTECS
KX2450000
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Synonyms & Trade Names
Dimethylene oxide; 1,2-Epoxy ethane; Oxirane
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DOT ID & Guide
1040 / 119P
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Exposure
Limits
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NIOSH REL: Ca TWA <0.1 ppm (0.18 mg/m3) C 5 ppm (9 mg/m3) [10-min/day] See Appendix A
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OSHA PEL: [1910.1047] TWA 1 ppm 5 ppm [15-minute Excursion]
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IDLH
Ca [800 ppm]
See: 75218
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Conversion
1 ppm = 1.80 mg/m3
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Physical Description
Colorless gas or liquid (below 51°F) with an ether-like odor.
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MW: 44.1
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BP: 51°F
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FRZ: -171°F
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Sol: Miscible
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VP: 1.46 atm
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IP: 10.56 eV
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RGasD: 1.49
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Sp.Gr: 0.82 (Liquid at 50°F)
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Fl.P: NA (Gas) -20°F (Liquid)
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UEL: 100%
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LEL: 3.0%
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Flammable Gas
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Incompatibilities & Reactivities
Strong acids, alkalis & oxidizers; chlorides of iron, aluminum & tin; oxides of iron & aluminum; water
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Measurement Methods
NIOSH 1614, 3800; OSHA 30, 49, 50
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact (liquid)
Eyes: Prevent eye contact (liquid)
Wash skin: When contaminated (liquid)
Remove: When wet (flammable)
Change: No recommendation
Provide: Quick drench (liquid)
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately (liquid)
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Respirator Recommendations (See Appendix E)
NIOSH
Up to 5 ppm:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern†
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern†/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion (liquid), skin and/or eye contact
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Symptoms
Irritation eyes, skin, nose, throat; peculiar taste; headache; nausea, vomiting, diarrhea; dyspnea (breathing difficulty), cyanosis, pulmonary edema; drowsiness, lassitude (weakness, exhaustion), incoordination; EKG abnormalities; eye, skin burns (liquid or high vapor concentration); liquid: frostbite; reproductive effects; [potential occupational carcinogen]; in animals: convulsions; liver, kidney damage
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Target Organs
Eyes, skin, respiratory system, liver, central nervous system, blood, kidneys, reproductive system
Cancer Site
[peritoneal cancer, leukemia]
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See also: INTRODUCTION
See ICSC CARD: 0155 See MEDICAL TESTS: 0106
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