ABSTRACT
CASRN: 75-31-0; DOT: 1221; DOT label: Flammable/combustible liquid; molecular formula: C3H9N; FW: 59.11; RTECS: NT8400000; Merck Index: 12, 5228 Physical state, color, and odor: Colorless liquid with a penetrating, ammonia-like odor. Experimentally determined detection and recognition odor threshold concentrations were 500 µg/m3 (210 ppbv) and 1.7 mg/m3 (700 ppbv), respectively (Hellman and Small, 1974). An odor threshold concentration of 25 ppbv was reported by Nagata and Takeuchi (1990). Melting point (°C): -95.2 (Weast, 1986) -101 (Windholz et al., 1983) Boiling point (°C): 31.5 at 753 mmHg (Kobe and Mathews, 1970) 33-34 (Windholz et al., 1983) Density (g/cm3): 0.6891 at 20 °C (Weast, 1986) 0.686 at 25 °C (Dean, 1987) 0.694 at 15 °C (Sax and Lewis, 1987) Diffusivity in water (x 10-5 cm2/sec): 0.97 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: 10.53 at 25 °C (Dean, 1973) Flash point (°C): -37.5 (open cup, NIOSH, 1997) -26 (open cup, Windholz et al., 1983) Ionization potential (eV): 8.72 ± 0.03 (Franklin et al., 1969) 8.86 (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. However, its high solubility in water and low Kow suggest its adsorption to soil will be nominal (Lyman et al., 1982). Octanol/water partition coefficient, log Kow: 0.26 at 20 °C (shake flask-GLC, Takayama et al., 1985) -0.03 (quoted, Leo et al., 1971)
In mole fraction at 4.5 °C: 0.488 in ethylene glycol, 0.517 in diethylene glycol, 0.552 in triethylene glycol (Copley et al., 1941) Solubility in water: Miscible (NIOSH, 1997). Vapor density: 2.42 g/L at 25 °C, 2.04 (air = 1) Vapor pressure (mmHg): 460 at 20 °C (quoted, Verschueren, 1983) 743 at 32.2 °C (Copley et al., 1941) Environmental fate: Photolytic. 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. Releases toxic nitrogen oxides when heated to decomposition (Sax and Lewis, 1987). Forms water-soluble salts with acids. Exposure limits: NIOSH REL: IDLH 750 ppm; OSHA PEL: TWA 5 ppm (12 mg/m3); ACGIH TLV: TWA 5 ppm, STEL 10 ppm (adopted). Symptoms of exposure: Strong irritation to the eyes, skin, throat, and respiratory system; pulmonary edema. Skin contact may cause dermatitis and skin burns (Patnaik, 1992). Toxicity: Acute oral LD50 for guinea pigs 2,700 mg/kg, mice 2,200 mg/kg, rats 820 mg/kg, rabbits 3,200 mg/kg (quoted, RTECS, 1985). Uses: Intermediate in the synthesis of rubber accelerators, dyes, pharmaceuticals, insecticides, bactericides, textiles, and surface-active agents; solvent; dehairing agent; solubilizer for 2,4-D.
