ABSTRACT
CASRN: 64-19-7; DOT: 2789 (glacial, >80% acid), 2790 (10 to 80% acid); DOT label: Corrosive; molecular formula: C2H4O2; FW: 60.05; RTECS: AF1225000; Merck Index: 12, 52 Physical state, color, odor, and taste: Clear, colorless, corrosive liquid with a strong vinegar-like odor and very sour taste. Odor threshold concentrations of 1.0 ppmv and 6.0 ppbv were reported by Leonardos et al. (1969) and Nagata and Takeuchi (1990), respectively. Shaw et al. (1970) reported a taste threshold in water of 100 ppm. Melting point (°C): 16.6 (Weast, 1986) Boiling point (°C): 118.0 (Burguet et al., 1996) 117.0 (Aljimaz et al., 2000) Density (g/cm3): 1.04365at 20.00 °C (Burguet et al., 1996) 1.04390 at 25.00 °C (Tamura et al., 2000) 1.04462 at 25.00 °C, 1.03895 at 30.00 °C (Lee and Chuang, 1997) Diffusivity in water (x 10-5 cm2/sec): 1.19 at 25 °C (quoted, Hayduk and Laudie, 1974) Dissociation constant, pKa: 4.74 (Windholz et al., 1983) 4.733 (Korman and La Mer, 1936) Flash point (°C): 39.5 (NIOSH, 1994) 44.4 (open cup, CHRIS, 1984) Lower explosive limit (%): 4.0 (NFPA, 1984) Upper explosive limit (%): 19.9 at 93-94 °C (NFPA, 1984) Heat of fusion (kcal/mol): 2.801 (quoted, Riddick et al., 1986) Henry’s law constant (x 10-7 atm⋅m3/mol): 1.82 at 25 °C (Khan et al., 1995)
1 at pH 4 (quoted, Gaffney et al., 1987) 1.81 at the pH range 1.6 to 1.9 (Khan and Brimblecombe, 1992) 1.08 at 25 °C (value concentration dependent, Servant et al., 1991) 133, 122, 6.88, and 1.27 at pH values of 2.13, 3.52, 5.68, and 7.14, respectively (25 °C, Hakuta et
al., 1977) Ionization potential (eV): 10.69 ± 0.03 (Franklin et al., 1969) 10.65 ± 0.02 (Lias, 1998) Soil organic carbon/water partition coefficient, log Koc: 0.00 (quoted, Meylan et al., 1992) Octanol/water partition coefficient, log Kow: -0.17 at pH 3.5 and 25 °C (shake flask-absorption spectrometry, Takacs-Novak and Szasz, 1999) -0.53 at 20-25 °C (shake flask, Onitsuka et al., 1989) -0.31 at 20 °C (shake flask-titration, Collander, 1951) Solubility in organics: Miscible with alcohol, carbon tetrachloride, glycerol (Windholz et al., 1983), and many other water soluble solvents. Solubility in water: Miscible (NIOSH, 1994) Vapor density: 2.45 g/L at 25 °C, 2.07 (air = 1) Vapor pressure (mmHg): 11.4 at 20 °C (quoted, Verschueren, 1983) 20.0 at 29.80 °C, 35.2 at 40.25 °C (static method, Potter and Ritter, 1954) 29.08 at 36.60 °C (Plesnar et al., 1996) 57.5 at 40 °C, 425.1 at 80 °C (Wilding et al., 2002a) 64.2 at 52.36 °C (dynamic boiling point method, McDonald et al., 1959) Environmental fate: Biological. Near Wilmington, NC, organic wastes containing acetic acid (representing 52.6% of total dissolved organic carbon) were injected into an aquifer containing saline water to a depth of approximately 1,000 feet below ground surface. The generation of gaseous components (hydrogen, nitrogen, hydrogen sulfide, carbon dioxide, and methane) suggests acetic acid and possibly other waste constituents, were anaerobically degraded by microorganisms (Leenheer et al., 1976). Plant. Based on data collected during a 2-h fumigation period, EC50 values for alfalfa, soybean, wheat, tobacco, and corn were 7.8, 20.1, 23.3, 41.2, and 50.1 mg/m3, respectively (Thompson et al., 1979). Photolytic. A photooxidation half-life of 26.7 d was based on an experimentally determined rate constant of 6 x 10-13 cm3/molecule⋅sec at 25 °C for the vapor-phase reaction of acetic acid with OH radicals in air (Atkinson, 1985). In an aqueous solution, the rate constant for the reaction of acetic acid with OH radicals was determined to be 2.70 x 10-17 cm3/molecule⋅sec (Dagaut et al., 1988).
