Diethylamine

  • N-Ethylethanamine
  • Diethamine
  • N,N-Diethylamine
Formula
(C2H5)2NH
Structure
Description
Water-white or colorless liquid with an ammonia-like odor.
Uses
In petroleum industry, in flotation agents, dyes, pharmaceuticals.

Registry Numbers and Inventories.
CAS
109-89-7
EC (EINECS/ELINCS)
203-716-3
EC Index Number
612-003-00-X
EC Class
Highly flammable; Harmful; Corrosive
R 11 20/21/22 35
S 3 16 26 29 36/37/39 45
RTECS
HZ8750000
RTECS class
Tumorigen; Mutagen; Primary Irritant
UN (DOT)
1154
Merck
13,3138
Beilstein/Gmelin
605268
Beilstein Reference
4-11-00-00122
Swiss Giftliste 1
G-1492
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H11N
Formula mass
73.14
Melting point, °C
-50
Boiling point, °C
55.5
Vapor pressure, mmHg
194 (21 C)
Vapor density (air=1)
2.5
Evaporization number
16.9 (butyl acetate = 1)
Odor Threshold Odor threshold 20 ppb
Critical temperature
224
Critical pressure
36.6
Density
0.7048 g/cm3 (20 C)
Solubility in water
Miscible
Viscosity
0.319 cp at 25C
Surface tension
20.19 g/s2 (20 C)
Refractive index
1.3864 (20 C)
pKa/pKb
2.91 (pKb)
Partition coefficient, pKow
0.58
Heat of fusion
6.2 kJ/mol
Heat of vaporization
32.0 kJ/mol
Heat of combustion
-3038 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from organic halogens. Keep away from acids.
B2 D1B E
Handling
Use with adequate ventilation. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
a full facepiece respirator with an ammonia/methylamine cartridge may be worn up to 50 times the exposure limit or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest. For emergencies or instances where the exposure levels are not known, use a full-facepiece positive-pressure, air-supplied respirator. A recommended cartridge is not specifically approved for this substance. Organic vapor cartridges are also approved for this material, but they have a short service life (i.e., less than 30 minutes at concentrations ten times the exposure limits).
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Use water spray to dilute spill to a non-flammable mixture. Use water spray to disperse the gas/vapor. Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizers, acids, cellulose nitrate, some metals and dicyanofuroxan. N-nitrosamines, many of which are known to be potent carcinogens, may be formed when this product comes in contact with nitrous acid, nitrates, or atmospheres with high nitrous oxide concentrations.
Decomposition
Burning may produce ammonia, carbon monoxide, carbon dioxide, nitrogen oxides.

Fire.
Flash Point,°C
-28
Autoignition, °C
312
Upper exp. limit, %
10.1
Lower exp. limit, %
1.8
Fire fighting
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use alcohol foam, dry chemical or carbon dioxide. Use water spray to knock-down vapors.
Fire potential
Very flammable. Enter with great care.
Hazards
Vapors are heavier than air and may travel to a source of ignition and flash back.
Combustion products
Vapors are irritating Vapors are heavier than air and may travel considerable distance to a source of ignition and flash back.
Health
3
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL: TWA 25 ppm (75 mg/m3) NIOSH REL: TWA 10 ppm (30 mg/m3) ST 25 ppm (75 mg/m3) NIOSH IDLH: 200 ppm
Poison_Class
3
Exposure effects
Repeated contact of eyes with vapors may result in swelling of the eyes and foggy vision. Chronic exposure may affect kidney and liver. Animal studies have shown target organ effects on the heart.
   Ingestion
Corrosive. Harmful if swallowed. May cause burns of the mouth, throat and stomach with severe abdominal pain and collapse. Ingestion may cause death if not treated promptly. Ingestion has been linked to cardiovascular effects in laboratory animals.
   Inhalation
Corrosive. Vapors irritate the respiratory tract causing coughing, chest pain, or immediate or delayed breathing difficulties. Exposure to moderately high concentrations of the vapor may cause severe pulmonary edema. Experimental animals exposed to 100ppm showed severe heart tissue degeneration.
   Skin
Corrosive. Contact can cause irritation with redness, pain, and possible skin burns. Covered contact with wet clothing can cause severe skin burns. May be absorbed through the skin.
   Eyes
Corrosive. Vapors irritate the eyes, causing tears, redness, pain, blurred vision. Corneal edema may occur with symptoms of blue haze or fogginess around lights. Liquid contact is an emergency and will produce serious eye injury, possibly blindness.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. Give large quantities of water. Never give anything by mouth to an unconscious person. Call a physician immediately. If swallowed, DO NOT INDUCE VOMITING. Give large quantities of water. Never give anything by mouth to an unconscious person. Get medical attention immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1154
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
DEN
 
7 Aliphatic amines
HS Code
2921 12 00
 
Std. Transport #
4907815
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
S/P