This month our example is
Aminoethylene also called Ethyleneimine or Ethylene
Imine which is a clear, colorless liquid with an intense
odor of ammonia (the odor threshold is 1.5 ppm).
It is soluble in alcohol and miscible in water and most
organic solvents. Its chemical formula is
C2H5N, which corresponds to a
molecular weight of 43.07. Aminoethylene has a
vapor density greater than air, so any vapors are going
to seek low spots.
At standard conditions of sea level
and 68°F. The chemical has a vapor pressure of
0.21 atmospheres, which is equivalent to 160 mm of
Hg. With a melting point of -97°F and a boiling
point of 133°F, it is typically found as a liquid.
It has a relatively low flash point 12°F making it a
flammability hazard. It has an IDLH of 100 ppm,
which means it is also presents a substantial health
hazard. The OSHA work place exposure limit for an
8-hour work shift is 0.5 ppm.
- Ethyleneimine can affect you when
breathed in and by passing through your skin.
- Ethyleneimine should be handled as
a CARCINOGEN--WITH EXTREME CAUTION. It may
damage the developing fetus.
- Exposure can cause nausea,
headaches, dizziness and severely irritate the eyes,
nose and throat. Higher levels can cause fluid
in the lungs (pulmonary edema) and kidney
damage. It can cause death.
- Ethyleneimine is a FLAMMABLE and
REACTIVE CHEMICAL and is a FIRE AND EXPLOSION HAZARD.
Ethylene imine is extremely
irritating to the eyes, skin, and respiratory tract and
is a blistering agent. Respiratory effects may be
delayed for several hours. Direct eye exposure may
result in permanent corneal opacity. Renal damage and
hematological effects have been seen in humans. Chronic
exposure in humans and animals has been reported to
cause effects on the blood.
shipped in the following containers - Glass bottles
or security sealed glass ampules, metal drums, and
uses - Monomer for polymerization (a chemical
intermediate in the production of other chemicals);
textile chemicals, adhesives, binders, resins,
lubricants, surfactants, a flocculating agent in water
treatment, and photographic chemicals.
chemicals or materials to avoid contact with -
Acids; and sodium hypochlorite (bleach). Caution:
Explosive polymerization may occur upon contact with
acid. Explosive compounds may form on contact with
names or synonyms - Aminoethylene; azacyclopropane;
azirane; azindine; 1H-azinne, dihydro-; dihydroazirene;
dimethyleneimine; dimethylenimine; ethylenimine.
In using the PEAC application we
access information for the chemical by first locating
Aminoethylene in the database. The following
figures show the screens displayed for chemical
properties, Figure 1 for the PEAC-WMD for Windows
application and Figure 2-4 for the PEAC-WMD for
the Pocket PC application.
Figure 1 - Using the Lookup By: Name for
Aminoethylene using the PEAC-WMD 2002 for Windows
Review of the information displayed
in the chemical properties screen whether in Figure 1
(above) or Figures 3 & 4 (below), show chemical
properties values discussed earlier at the top of this
discussion. In addition, other values are provided
such as the TEELs (Temporary Emergency Exposure Limit)
published by Department of Energy.
Figure 2 – Selecting
Aminoethylene using the PEAC-WMD for Pocket PC
Figure 3 – The top portion of
the Chemical Properties Data Display Screen
Figure 4 – The bottom portion
of the Chemical Properties Data Display Screen
Additional information is available
regarding how to prevent skin contact by checking the
CPC listing, i.e., Chemical Protective
Clothing. This is shown in Figure 5, and as
with the Chemical Properties checking the CPC entries
for Hydrogen Fluoride might also be useful. As
shown, for Aminoethylene only miscellaneous and
suits are listed. The miscellaneous category is
how the PEAC database dealt with the DuPont CPC fabrics
that were used in many suits, e.g., DuPont Tychem
products, but weren’t manufactured as final products by
DuPont. This has changed to some degree since
DuPont has recent entered into a collaborative
partnership with Kappler, a manufacturer of CPC
For those unfamiliar with the PEAC
database and how CPC garments are displayed, there are
two possible display screens for CPC garments. The
All Chemical Protective Clothing displays
all entries in the PEAC database for the specific
chemical selected. The Available Chemical
Protective Clothing selection is based on filtering
the All Chemical Protective Clothing listing for
only those manufacturers that the user has already
indicated they have in their inventory. Without a
great deal of explanation, there is a simple to use
feature where the user indicates what manufacturers’
products they have in their inventory so a “short list”
can be provided rapidly to the user when on the scene.
Figure 5 - Displaying the CPC entries in
the PEAC database for Aminoethylene
Another benefit of using the PEAC
tool is assistance in the development of an evacuation
zone for those chemicals that produce a toxic vapor
cloud. Aminoethylene has a substantial vapor
pressure (160 mm Hg), so if spilled then an evacuation
may probably be required.
As with all of our examples,
AristaTek creates a scenario for a spill or release of
the specific chemical and then we work through the
development of a PAD (Protective Action Distance) to
demonstrate how the PEAC system works. For our
scenario using Aminoethylene as the spilled chemical
we’ll use Houston as the location and the time as 10:45
PM on November 20th. A trailer carrying
a mixed load of chemicals is involved in an accident and
a drum of Aminoethylene is ruptured and spills to create
a pool about 10 feet in diameter. The temperature
is about 70°F, the winds are 2 mph, it’s a clear night
(no clouds) and it surrounding area contains warehouses
As seen at the top of the data
display screens, there is a yellow icon displayed, this
is the PEAC icon for notifying the user that a
Protective Action Distance can be calculated.
Clicking or tapping on the PAD icon will display a
screen as shown in Figure 6. Following through the
screens, provide information on the Meteorology,
Container Size, and Type of Release (Source). The
last screen displays the PAD based on the provided
It’s Houston (or nearby) in
November and the temperature about 70°, light wind
is set for 2 mph, clear sky so we’ll set cloud
cover to 0%, and the terrain is Urban/Forest since
it’s an industrial setting.
We have selected from our list
of container sizes the drum/barrel
selection. This provides us with a default
size that should get us pretty close to the actual
Since Aminoethylene is a liquid
at these temperatures a liquid pool will be
formed. We’ve selected a circular pool and a
diameter of 10’ and the default depth of 0.4”.
Figure 6 – Calculating a PAD using the
The built-in PEAC dispersion model
makes a calculation using the IDLH of 100 ppm as the
Level of Concern as a default value. This
results in a downwind distance of ~250 yards, see Figure
7. The initial isolation zone in all directions is
100’ as displayed in the ERG2000 “green pages”.
The responder has the option to use a value other than
the IDLH as the end-point for the dispersion model
calculation. A different value can be entered for
the Level of Concern and the PAD calculator will
recompute a distance and display a new screen.
Figure 7 – PAD for