ABSTRACT
H3C CASRN: 121-44-8; DOT: 1296; DOT label: Flammable liquid; molecular formula: C6H15N; FW: 101.19; RTECS: YE0175000; Merck Index: 12, 9799 Physical state, color, and odor: Clear, colorless to light yellow flammable liquid with a strong, penetrating, ammonia-like odor. Experimentally determined detection and recognition odor threshold concentrations were <400 µg/m3 (<100 ppbv) and 1.1 mg/m3 (270 ppbv), respectively (Hellman and Small, 1974). An odor threshold concentration of 0.032 ppbv was determined by a triangular odor bag method (Nagata and Takeuchi, 1990). Melting point (°C): -114.7 (Weast, 1986) Boiling point (°C): 89.20 (Letcher and Bayles, 1971) Density (g/cm3): 0.7275 at 20 °C (Dutt et al., 1982) 0.72305 at 25 °C (Letcher and Bayles, 1971) Diffusivity in water (x 10-5 cm2/sec): 0.73 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: 11.01 at 18 °C (Gordon and Ford, 1972) 10.72 at 25 °C (Dean, 1973) Flash point (°C): -6.7 (NIOSH, 1997) Lower explosive limit (%): 1.2 (NIOSH, 1997) Upper explosive limit (%): 8.0 (NIOSH, 1997) Henry’s law constant (x 10-4 atm⋅m3/mol): 1.79 at 25 °C (Christie and Crisp, 1967) Interfacial tension with water (dyn/cm at 20 °C): 0.1 (quoted, Freitas et al., 1997) Ionization potential (eV): 7.50 ± 0.02 (Franklin et al., 1969)
oc Unavailable because experimental methods for estimation of this parameter for aliphatic amines are lacking in the documented literature Octanol/water partition coefficient, log Kow: 1.15 (pH 9.4), 1.44, 1.45 (pH 13) (quoted, Sangster, 1989) Solubility in organics: Miscible with alcohol and ether (Windholz et al., 1983) Solubility in water: 15,000 mg/L at 20 °C, 19,700 mg/L at 95 °C (quoted, Verschueren, 1983) 1.41 M at 20 °C (Fischer and Ehrenberg, 1948) 728 mmol/kg at 25.0 °C (shake flask-UV spectrophotometry, Vesala, 1974) In wt %: miscible at <18.0 °C, 14.38 at 18.0 °C, 12.38 at 19.0 °C, 11.24 at 20.0 °C, 10.23 at 21.0 °C, 10.29 at 22.0 °C, 8.91 at 24.0 °C, 8.00 at 26.0 °C, 6.51 at 28.0 °C, 3.93 at 30.0 °C, 3.60 at 40.0 °C, 2.59 at 50.0 °C, 1.96 at 60.0 °C, 1.60 at 70.0 °C, 1.38 at 80.0 °C (shake flask-GC, Stephenson, 1993b)
Vapor density: 4.14 g/L at 25 °C, 3.49 (air = 1) Vapor pressure (mmHg): 31.3 at 10 °C, 40.55 at 15 °C, 47.45 at 18 °C, 52.35 at 20 °C (Chun et al., 1971) 80 at 28.6 °C (ebulliometry, Dutt et al., 1982) Environmental fate: Photolytic. Low et al. (1991) reported that the photooxidation of aqueous tertiary amine solutions by UV light in the presence of titanium dioxide resulted in the formation of ammonium and nitrate ions. Chemical/Physical. Triethylamine reacted with NOx in the dark to form diethylnitrosamine. In an outdoor chamber, photooxidation by natural sunlight yielded the following products: diethylnitramine, diethylformamide, diethylacetamide, ethylacetamide, diethylhydroxylamine, ozone, acetaldehyde, and peroxyacetyl nitrate (Pitts et al., 1978). Exposure limits: NIOSH REL: IDLH 200 ppm; OSHA PEL: TWA 25 ppm (100 mg/m3); ACGIH TLV: TWA 1 ppm, STEL 3 ppm (adopted). Symptoms of exposure: Irritates eyes and mucous membranes. An irritation concentration of 200.00 mg/m3 in air was reported by Ruth (1986). Toxicity: Acute oral LD50 for mice 546 mg/kg, rats 460 mg/kg (quoted, RTECS, 1985). Uses: Curing and hardening polymers; catalytic solvent in chemical synthesis; accelerator activators for rubber; wetting, penetrating, and waterproofing agents of quaternary ammonium types; corrosion inhibitor; propellant.
