Ethyleneimine

  • Aziridine
  • Dimethyleneimine
  • Azacyclopropane
Formula
C2H5N
Structure
Description
A clear colorless liquid with an ammonia-like odor.
Uses
Polymerization products used in the paper industry & as flocculation aids.

Registry Numbers and Inventories.
CAS
151-56-4
EC (EINECS/ELINCS)
205-793-9
EC Index Number
613-001-00-1
EC Class
Highly flammable; Carcinogenic Category 2; Mutagenic Category 2; Very toxic; Corrosive; Dangerous for the Environment
RTECS
KX5075000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
1185
Merck
12,3850
Beilstein/Gmelin
102380
Beilstein Reference
5-20-01-00003
RCRA
P054
Swiss Giftliste 1
G-1182
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H5N
Formula mass
43.07
Melting point, °C
-78
Boiling point, °C
56
Vapor pressure, mmHg
213 (25 C)
Vapor density (air=1)
1.48
Odor Threshold Odor threshold 2 ppm
Critical temperature
283
Critical pressure
122.89
Density
0.8351 g/cm3 (20 C)
Solubility in water
Miscible
Surface tension
31.62 g/s2 (20 C)
Refractive index
1.4122 (20 C)
pKa/pKb
5.96 (pKb)
Partition coefficient, pKow
-0.76
Heat of vaporization
30.0 kJ/mol
Heat of combustion
-1595 kJ/mol

Hazards and Protection.
Storage
Can be stored for short periods over sodium hydroxide pellets.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to disperse vapors and dilute standing pools of liquid.
Stability
Reactive under confinement, extreme caution. Polymerizes easily.
Incompatibilities
Reacts with sodium hypochlorite and other chlorinating agents to give the explosive compound 1-chloroazidine Incompatible with silver or aluminum, which induce polymerization May polymerize explosively upon contact with acids.

Fire.
Flash Point,°C
-11
Autoignition, °C
320
Upper exp. limit, %
5.4
Lower exp. limit, %
3.3
Fire fighting
Do not extinguish fire unless flow can be stopped; use water in flooding quantities as a fog. Solid streams of water may be ineffective. Apply water from as far a distance as possible.If tank car or truck is involved in fire, isolate the surrounding area in a 1/2 mile radius.Dry chemical, alcohol foam, or carbon dioxide are useful for small fires. For large fires: water spray, fog or foam.
Fire potential
Flammable liquid and vapor.
Hazards
Irritating vapors are generated when heated. Vapor is heavier than air and may travel a considerable distance to a source of ignition and flash back. May polymerize in fires with evolution of heat and container rupture. Runoff to sewer may create fire or explosion hazard. Ethyleneimine vapors are not inhibited and may form polymers in vents or flame arresters, resulting in stopping of the vents. Toxic oxides of nitrogen are produced during combustion. Upon treatment with sodium hypochlorite, it gives off the explosive compound 1-chloroazidine. Avoid acids, sodium hypochlorite. If heated under pressure, instability may result. Hazardous polymerization may occur. Avoid contact with silver or aluminum. Explosive polymerization may occur upon contact with acids. Polymerization is catalyzed by carbon dioxide.
Combustion products
Toxic oxides of nitrogen are produced during combustion of this material.
Health
4
 
Flammability
3
 
 
Reactivity
3
 

Health.
Exposure limit(s)
TLV: 0.5 ppm; 0.88 mg/m3 (skin) (ACGIH 1993-1994). OSHA PEL: 1910.1012 See Appendix B NIOSH REL: Ca See Appendix A NIOSH IDLH: Potential occupational carcinogen 100 ppm
Carcinogin
O, G-A3, I-2B, CP65
Poison_Class
1*
Exposure effects
CNS effects have been seen in exposed workers and animals. Developmental and paternal effects have been noted in experimental animals.
   Ingestion
Nausea and vomiting may occur. Irritation or burns of the esophagus or gi tract could develop following ingestion.
   Inhalation
Respiratory tract irritation with coughing and possible delayed pulmonary edema may develop.
   Skin
Dermal irritation or burns may be seen. This agent is absorbed through the skin. Dermal sensitization may occur.
   Eyes
Irritation of eyes, nose, and throat may occur. Corneal damage may occur.

First aid
 
   Ingestion
Do not induce emesis - dilution: following ingestion and/or prior to gastric evacuation, immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 15 ml/kg in a child). The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes.
   Skin
Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes. Wash skin with soap and water.
   Eyes
In case of contact with substance, immediately flush with running water for at least 20 minutes.

Transport.
UN number
1185
Response guide
Hazard class
6.1
PRTC
T
Packing Group
I
 
USCG CHRIS Code
ETI
 
Std. Transport #
4927006