| Physical Description |
Ethanolamine appears as a clear colorless liquid with an odor resembling that of ammonia. Flash point 185 °F. May attack copper, brass, and rubber. Corrosive to tissue. Moderately toxic. Produces toxic oxides of nitrogen during combustion. |
| Color/Form |
Colorless, viscous liquid or solid (below 51 °F) |
| Odor |
Unpleasant, ammonia-like |
| Boiling Point |
338 °F at 760 mmHg (NTP, 1992) |
| Melting Point |
50.5 °F (NTP, 1992) |
| Flash Point |
200 °F (NTP, 1992) |
| Solubility |
greater than or equal to 100 mg/mL at 68 °F (NTP, 1992) |
| Density |
1.016 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Vapor Density |
2.1 (NTP, 1992) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure |
0.4 mmHg at 68 °F ; 6 mmHg at 140 °F (NTP, 1992) |
| LogP |
-1.31 |
| Stability/Shelf Life |
Chemical stability: Absorbs carbon dioxide (CO2) from air. Stable under recommended storage conditions. |
| Autoignition Temperature |
770 °F (NTP, 1992) |
| Decomposition |
When heated to decomposition it emits toxic fumes of /nitrogen oxides/. |
| Viscosity |
18.95 cP at 25 °C; 5.03 cP at 60 °C |
| Heat of Combustion |
-10710 Btu/lb = -5950 cal/g = -249X10+5 J/kg |
| Heat of Vaporization |
49.83 kJ/mol at 171 °C |
| pH |
25% aqueous solution: 12.1; 0.1 N aqueous solution: 12.05 |
| Ionization Potential |
8.96 eV |
| Odor Threshold |
Odor Threshold Low: 2.6 [mmHg] Odor Threshold High: 5.0 [mmHg] Odor threshold (detect at 2.6 ppm and recognize at 5 ppm) from CHEMINFO |
| Refractive Index |
Index of refraction: 1.4541 at 20 degC/D |
| Dissociation Constants |
9.5 |
| Kovats Retention Index |
698 643 680 |
| Other Experimental Properties |
Hygroscopic |
| Chemical Classes |
Nitrogen Compounds -> Ethanolamines |