Ethanolamine

  • 2-Aminoethanol
  • 2-Hydroxethylamine
  • Monoethanolamine
  • Colamine
Formula
NH2CH2CH2OH
Structure
Description
Colorless, viscous liquid, unpleasant, fishy, ammoniacal odor. Hygroscopic.
Uses
CO2 and hydrogen sulfide extraction from natural gas and other gases, pharmaceutic aid, dispersing agent for agricultural chemicals, softening agent for hides, used in accelerator in manufacture of antibiotics, for prodn of emulsifiers, in polishes, in hair waving soln, in synth of surface active agents.

Registry Numbers and Inventories.
CAS
141-43-5
EC (EINECS/ELINCS)
205-483-3
EC Index Number
603-030-00-8
EC Class
Harmful; Irritant
R 20 36/37/38
RTECS
KJ5775000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
2491
Merck
13,3762
Beilstein/Gmelin
505944
Beilstein Reference
4-04-00-01406
EPA OPP
11601
Swiss Giftliste 1
G-1154
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H7NO
Formula mass
61.08
Melting point, °C
10.5
Boiling point, °C
171
Vapor pressure, mmHg
0.5 (25 C)
Vapor density (air=1)
2.10
Saturation Concentration
526 ppm at 20 C
Evaporization number
<1 (butyl acetate = 1)
Odor Threshold Odor threshold .6 ppm
Critical temperature
341
Critical pressure
67.8
Density
1.0164 g/cm3 (20 C)
Solubility in water
Miscible
Viscosity
24.1 cp (20 C)
Surface tension
48.89 g/s2 (20 C)
Refractive index
1.4539 (20 C)
Dipole moment
2.27 D (25 C)
Dielectric constant
37.72 (25 C)
pKa/pKb
4.50 (pKb)
Partition coefficient, pKow
-1.31
Heat of vaporization
49.9 kJ/mol
Heat of combustion
-1505 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from heat and flame. Keep away from sources of ignition. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
B3 D2B E
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Ground and bond containers when transferring material. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not ingest or inhale. Discard contaminated shoes. 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 protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.
Stability
Stable under normal temperatures and pressures. Absorbs carbon dioxide from the air.
Incompatibilities
Sulfuric acid, hydrochloric acid, acetic acid, carbon dioxide in the air, copper, copper alloys, galvanized iron, aluminum, acetic anhydride, acrolein, acrylic acid, acrylonitrile, chlorosulfonic acid, epichlorohydrin, hydrofluoric acid, mesityl oxide, nitric acid, oleum, beta-propiolactone, and vinyl acetate.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
85
Autoignition, °C
410
Upper exp. limit, %
17.0
Lower exp. limit, %
5.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Vapors mixed with air can explode when ignited. Combustible Liquid. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers.
Fire potential
Moderately flammable. Requires moderate heating.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Irritating vapors generated when heated.
Health
3
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: 3 ppm; 7.5 mg/m3; STEL: 6 ppm, 15 mg/m3 ACGIH 1993). OSHA PEL: TWA 3 ppm (6 mg/m3) NIOSH REL: TWA 3 ppm (8 mg/m3) ST 6 ppm (15 mg/m3) NIOSH IDLH: 30 ppm
Poison_Class
4
Exposure effects
May cause liver and kidney damage. Effects may be delayed.
   Ingestion
May cause severe and permanent damage to the digestive tract. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Causes gastrointestinal tract burns. May cause perforation of the digestive tract. May be harmful if swallowed. May cause systemic effects.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. Causes chemical burns to the respiratory tract. Aspiration may lead to pulmonary edema. May cause systemic effects. Inhalation at high concentrations may cause CNS depression and asphixiation.
   Skin
Causes moderate skin irritation. Harmful if absorbed through the skin. Causes skin burns. May cause dermatitis. May cause cyanosis of the extremities. May cause skin rash (in milder cases), and cold and clammy skin with cyanosis or pale color.
   Eyes
Causes eye burns. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated 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. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
2491
Response guide
Hazard class
8
Packing Group
III
 
USCG CHRIS Code
MEA
 
HS Code
2922 11 00
 
Std. Transport #
4935665
 
IMO Chemical Code
17
IMO Pollution Category
D
IMO Hazard code
S