ETHYLAMINE

H3C NH2 CASRN: 75-04-7; DOT: 1036; DOT label: Flammable liquid; molecular formula: C2H7N; FW: 45.08; RTECS: KH2100000; Merck Index: 12, 3808 Physical state, color, and odor: Colorless liquid or gas with a strong ammonia-like odor. An experimentally determined odor threshold concentration of 21 ppbv was reported by Leonardos et al. (1969). Experimentally determined detection and recognition odor threshold concentrations were 500 µg/m3 (270 ppbv) and 1.5 mg/m3 (810 ppbv), respectively (Hellman and Small, 1974). Melting point (°C): -80.5 (Chao et al., 1990) Boiling point (°C): 16.6 (Chao et al., 1990) Density (g/cm3): 0.71 at 0 °C (quoted, Verschueren, 1983) 0.6829 at 20 °C (Weast, 1986) 0.6767 at 25 °C (Chao et al., 1990) Diffusivity in water (x 10-5 cm2/sec): 1.13 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: 10.807 at 20 °C (Gordon and Ford, 1972) 10.63 at 25 °C (Dean, 1973) Flash point (°C): -17.4 (NIOSH, 1997) Lower explosive limit (%): 3.5 (NIOSH, 1997) Upper explosive limit (%): 14.0 (NIOSH, 1997) Henry’s law constant (x 10-5 atm⋅m3/mol at 25 °C): 1.00 (Butler and Ramchandani, 1935) 1.23 (Christie and Crisp, 1967) Ionization potential (eV): 9.19 (Gibson et al., 1977) Soil organic carbon/water partition coefficient, log Koc: Unavailable because experimental methods for estimation of this parameter for aliphatic amines are lacking in the documented literature

ow -0.13 at pH 13 (shake flask-GLC, Takayama et al., 1985) -0.30 (shake flask-titrimetry, Korenman et al., 1973) Solubility in organics: Miscible with alcohol and ether (Hawley, 1981) Solubility in water: Miscible (NIOSH, 1997). A saturated solution in equilibrium with its own vapor had a concentration of 5,176 g/L at 25 °C (Kamlet et al., 1987). Vapor density: 1.84 g/L at 25 °C, 1.56 (air = 1) Vapor pressure (mmHg): 897 at 20 °C, 1,292 at 30 °C (quoted, Verschueren, 1983) Environmental fate: Photolytic. The rate constant for the reaction of ethylamine and ozone in the atmosphere is 2.76 x 10-20 cm3/molecule⋅sec at 296 K (Atkinson and Carter, 1984). Atkinson (1985) reported a rate constant of 6.54 x 10-11 cm3/molecule⋅sec for the vapor-phase reaction of ethylamine and OH radicals at 25.5 °C. The half-life for this reaction is 8.6 h. Low et al. (1991) reported that the photooxidation of aqueous primary amine solutions by UV light in the presence of titanium dioxide resulted in the formation of ammonium and nitrate ions. Chemical/Physical. Reacts with OH radicals possibly forming acetaldehyde or acetamide (Atkinson et al., 1978). When ethylamine over kaolin is heated to 600 °C, hydrogen and acetonitrile formed as the major products. Trace amounts of ethylene, ammonia, hydrogen cyanide, and methane were also produced. At 900 °C, however, acetonitrile was not produced (Hurd and Carnahan, 1930). Reacts with mineral acids forming water-soluble salts (Morrison and Boyd, 1971). Exposure limits: NIOSH REL: TWA 10 ppm (18 mg/m3), IDLH 600 ppm; OSHA PEL: TWA 10 ppm; ACGIH TLV: TWA 5 ppm, STEL 10 ppm (adopted). Symptoms of exposure: Severe irritant to the eyes, skin, mucous membranes, and respiratory system (Patnaik, 1992; Windholz et al., 1983) Toxicity: LC50 (96-h) for goldfish 170 mg/L at pH 10.2 (quoted, Verschueren, 1983). LC50 (24-h) for goldfish 190 mg/L at pH 10.2 (quoted, Verschueren, 1983). LC0 (24-h) and LC100 (24-h) values for creek chub in Detroit river water were 30 and 50 mg/L, respectively (Gillette et al., 1952). Acute oral LD50 for rats 400 mg/kg (quoted, RTECS, 1985). Uses: Stabilizer for latex rubber; intermediate for dyestuffs and medicinals; resin and detergent manufacturing; solvent in petroleum and vegetable oil refining; starting material for manufacturing amides; plasticizer; stabilizer for rubber latex; in organic synthesis.