ABSTRACT
CASRN: 79-20-9; DOT: 1231; DOT label: Flammable liquid; molecular formula: C3H6O2; FW: 74.08; RTECS: AI9100000; Merck Index: 12, 6089 Physical state, color, and odor: Colorless liquid with a pleasant odor. An odor threshold concentration of 48 ppbv was reported by Nagata and Takeuchi (1990). Cometto-Muñiz and Cain (1991) reported an average nasal pungency threshold concentration of 112,500 ppmv. Melting point (°C): -98.1 (Weast, 1986) Boiling point (°C): 56.72 (Blanco and Ortega, 1996) 56.90 (Wisniak and Gabai, 1996) Density (g/cm3): 0.94019 at 15 °C, 0.92709 at 25 °C, 0.91380 at 35 °C, 0.90028 at 45 °C (Sakurai et al., 1996) 0.93364 at 20.00 °C (Lee and Tu, 1999) 0.9282 at 25.00 °C, 0.9218 at 30.00 °C (Aminabhavi and Banerjee, 1998b) 0.92848 at 25.00 °C (Lu et al., 2001) Diffusivity in water (x 10-5 cm2/sec): 1.01 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): -5.6 (NIOSH, 1997) Lower explosive limit (%): 3.1 (NIOSH, 1997) Upper explosive limit (%): 16 (NIOSH, 1997) Henry’s law constant (x 10-4 atm⋅m3/mol): 1.28 at 25 °C (Kieckbusch and King, 1979) 1.94 at 30 °C, 2.43 at 35 °C (headspace-GC, Arp and Schmidt, 2004) 0.91 at 25 °C (Butler and Ramchandani, 1935) 1.15 at 25 °C (Buttery et al., 1969) 0.90 at 20.00 °C, 1.56 at 30.00 °C (headspace-GC, Hovorka et al., 2002) Interfacial tension with water (dyn/cm): 1.6 at 25 °C (quoted, Freitas et al., 1997) Ionization potential (eV): 10.27 ± 0.02 (Franklin et al., 1969)
oc Unavailable because experimental methods for estimation of this parameter for aliphatic esters are lacking in the documented literature Octanol/water partition coefficient, log Kow: 0.17 at 20.0 °C (shake flask, Collander, 1951) Solubility in organics: Soluble in acetone, benzene, and chloroform (Weast, 1986). Miscible with alcohol and ether (Sax and Lewis, 1987). Solubility in water: 245,000 mg/L at 20 °C (quoted, Riddick et al., 1986) 3.29 M at 20 °C (shake flask-turbidimetric, Fühner, 1924) Vapor density: 3.03 g/L at 25 °C, 2.56 (air = 1) Vapor pressure (mmHg): 198.6 at 23.1 °C, 216.3 at 25.0 °C, 254.6 at 28.6 °C, 299.6 at 32.4 °C (equilibrium vessel, Monton
et al., 1997) 216 at 25 °C (Abraham, 1984) Environmental fate: Photolytic. A rate constant of 2.00 x 10-13 cm3/molecule⋅sec was reported for the reaction of methyl acetate and OH radicals in aqueous solution (Wallington et al., 1988b). Chemical/Physical. Slowly hydrolyzes in water yielding methyl alcohol and acetic acid (NIOSH, 1997). The estimated hydrolysis half-life in water at 25 °C and pH 7 is 2.5 yr (Mabey and Mill, 1978). At an influent concentration of 1,030 mg/L, treatment with GAC resulted in an effluent concentration of 760 mg/L. The adsorbability of the carbon used was 54 mg/g carbon (Guisti et al., 1974). Exposure limits: NIOSH REL: TWA 200 ppm (610 mg/m3), STEL 250 ppm (760 mg/m3), IDLH 3,100 ppm; OSHA PEL: TWA 200 ppm; ACGIH TLV: TWA 200 ppm, STEL, 250 ppm (adopted). Symptoms of exposure: Inflammation of the eyes, visual and nervous disturbances, tightness of the chest, drowsiness, and narcosis (Patnaik, 1992). An irritation concentration of 30.5 g/m3 in air was reported by Ruth (1986). Toxicity: Acute oral LD50 for rabbits 3,705 mg/kg, rats 5,450 mg/kg (quoted, RTECS, 1985). Uses: Solvent for resins, lacquers.
