ABSTRACT
CASRN: 141-43-5; DOT: 2491; DOT label: Corrosive material; molecular formula: C2H7NO; FW: 61.08; RTECS: KJ5775000; Merck Index: 12, 3772 Physical state, color, and odor: Colorless, viscous, hygroscopic liquid with an unpleasant, mild, ammonia-like odor. Odor threshold concentration is 2.6 ppm (quoted, Amoore and Hautala, 1983). The lowest taste threshold concentration in potable water at 40 °C was 2.4 mg/L (Alexander et al., 1982). Melting point (°C): 10.3 (Weast, 1986) Boiling point (°C): 170 (Weast, 1986) Density (g/cm3): 1.0180 at 20 °C (Weast, 1986) 1.0117 at 25 °C (Windholz et al., 1983) 1.0091 at 30 °C, 1.0013 at 40 °C, 0.9934 at 50 °C, 0.9854 at 60 °C, 0.9774 at 70 °C (Song et al.,
1996) Diffusivity in water (x 10-5 cm2/sec): At 25 °C (concentration, mmol/L): 1.15 (47.2), 1.16 (94.7), 1.06 (562), 0.984 (1,070), 0.910
(1,980), 0.838 (2,970) (Hikita et al., 1980) 1.12 at 43 mmol/L and 24.8 °C, 1.39 at 49 mmol/L and 34.8 °C, 1.75 at 55 mmol/L and 44.8 °C,
2.26 at 58 mmol/L and 59.8 °C (Snijder et al., 1993) Dissociation constant, pKa: 9.50 at 25 °C (Dean, 1973) Flash point (°C): 86 (NIOSH, 1997) 90.6 (Windholz et al., 1983) Lower explosive limit (%): 3.0 at 140 °C (NIOSH, 1997) Upper explosive limit (%): 23.5 (NIOSH, 1997) Heat of fusion (kcal/mol): 4.90 (quoted, Riddick et al., 1986) Henry’s law constant (x 10-10 atm⋅m3/mol): 1.61 at 20 °C (Bone et al., 1983)
8.96 (NIOSH, 1997) Soil organic carbon/water partition coefficient, log Koc: Unavailable because experimental methods for estimation of this parameter for amines are lacking in the documented literature. However, its miscibility in water and low Kow suggest its adsorption to soil will be nominal (Lyman et al., 1982). Octanol/water partition coefficient, log Kow: -1.31 at 19.0 °C (shake flask-Kjeldahl analysis, Collander, 1951) Solubility in organics: Miscible with acetone and methanol; soluble in benzene (1.4 wt %), carbon tetrachloride (0.2 wt %), and ether (2.1 wt %) (Windholz et al., 1983). Solubility in water: Miscible (NIOSH, 1997). Vapor density: 2.50 g/L at 25 °C, 2.11 (air = 1) Vapor pressure (mmHg): 0.4 at 20 °C, 6 at 60 °C (quoted, Verschueren, 1983) 0.48 at 20 °C (Hawley, 1981) Environmental fate: Biological. Bridié et al. (1979) reported BOD and COD values of 0.93 and 1.28 g/g using filtered effluent from a biological sanitary waste treatment plant. These values were determined using a standard dilution method at 20 °C for a period of 5 d. Similarly, Heukelekian and Rand (1955) reported a 5-d BOD value of 0.85 g/g which is 65.0% of the ThOD value of 1.31 g/g. Chemical/Physical. Aqueous chlorination of ethanolamine at high pH produced Nchloroethanolamine, which slowly degraded to unidentified products (Antelo et al., 1981). At an influent concentration of 1,012 mg/L, treatment with GAC resulted in an effluent concentration of 939 mg/L. The adsorbability of the carbon used was 15 mg/g carbon (Guisti et al., 1974). Exposure limits: NIOSH REL: TWA 3 ppm (8 mg/m3), STEL 6 ppm (15 mg/m3), IDLH 30 ppm; OSHA PEL: TWA 3 ppm; ACGIH TLV: TWA 0.3 ppm, STEL 6 ppm (adopted). Symptoms of exposure: Severe irritation of eyes and moderate skin irritation (Patnaik, 1992) Toxicity: LC50 (96-h) for goldfish >5,000 mg/L at pH 7 (quoted, Verschueren, 1983). LC50 (72-h) for goldfish 170 mg/L at pH 10.1 (quoted, Verschueren, 1983). LC50 (24-h) for goldfish 190 mg/L at pH 10.1 (quoted, Verschueren, 1983). Acute oral LD50 for guinea pigs 620 mg/kg, mice 700 mg/kg, rats 2,050 mg/kg, rabbits 1,000 mg/kg (Patnaik, 1992). Uses: Removing carbon dioxide and hydrogen sulfide from natural gas; in emulsifiers, hair waving solutions, polishes; softening agent for hides; agricultural sprays; pharmaceuticals, chemical intermediates; corrosion inhibitor; rubber accelerator; nonionic detergents; wool treatment.
