NIOSH Pocket Guide to Chemical Hazards

Ethyleneimine CAS 151-56-4
C2H5N RTECS KX5075000
Synonyms & Trade Names
Aminoethylene, Azirane, Aziridine, Dimethyleneimine, Dimethylenimine, Ethylenimine, Ethylimine
DOT ID & Guide
1185 131P (inhibited)
NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1012] See Appendix B
IDLH Ca [100 ppm] Conversion 1 ppm = 1.76 mg/m3
Physical Description
Colorless liquid with an ammonia-like odor. [Note: Usually contains inhibitors to prevent polymerization.]
MW: 43.1
BP: 133°F
FRZ: -97°F
Sol: Miscible
VP: 160 mmHg
IP: 9.20 eV

Sp.Gr: 0.83
Fl.P: 12°F
UEL: 54.8%
LEL: 3.3%

Class IB Flammable Liquid: Fl.P. below 73F and BP at or above 100F.
Incompatibilities & Reactivities
Polymerizes explosively in presence of acids [Note: Explosive silver derivatives may be formed with silver alloys (e.g., silver solder).]
Measurement Methods
NIOSH 3514
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (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 organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat; nausea, vomiting; headache, dizziness; pulmonary edema; liver, kidney damage; eye burns; skin sensitization; [potential occupational carcinogen]
Target Organs Eyes, skin, respiratory system, liver, kidneys

Cancer Site [in animals: lung & liver tumors]