ABSTRACT
CH3CH3 CASRN: 105-46-4; DOT: 1123; DOT label: Flammable liquid; molecular formula: C6H12O2; FW: 116.16; RTECS: AF7380000; Merck Index: 12, 1571 Physical state, color, and odor: Clear, colorless liquid with a pleasant odor. Odor threshold concentration in air is 2.4 ppbv (Nagata and Takeuchi, 1990). Melting point (°C): -37.8 (NIOSH, 1997) Boiling point (°C): 112 (Weast, 1986) Density (g/cm3): 0.8864 at 5 °C, 0.8759 at 15 °C, 0.8654 at 25 °C, 0.8547 at 35 °C, 0.8440 at 45 °C (Sakurai et al.,
1996) 0.8758 at 20 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.74 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): 16.7 (NIOSH, 1997); 31 (open cup, Windholz et al., 1983) Lower explosive limit (%): 1.7 (NIOSH, 1997) Upper explosive limit (%): 9.8 (NIOSH, 1997) Henry’s law constant (x 10-4 atm⋅m3/mol): 1.91 at 20 °C (approximate - calculated from water solubility and vapor pressure) Interfacial tension with water (dyn/cm at 17 °C): 58 (estimated, CHRIS, 1984) Ionization potential (eV): 9.91 ± 0.03 (Franklin et al., 1969) Soil organic carbon/water partition coefficient, log Koc: Unavailable because experimental methods for estimation of this parameter for aliphatic esters are lacking in the documented literature
ow 1.72 (shake flask, Hansch et al., 1995) Solubility in organics: Soluble in acetone, alcohol, and ether (Weast, 1986) Solubility in water (wt %): 1.330 at 0 °C, 0.879 at 9.6 °C, 0.869 at 19.5 °C, 0.753 at 29.7 °C, 0.663 at 39.9 °C, 0.629 at 50.0 °C, 0.613 at 60.1 °C, 0.605 at 70.5 °C, 0.622 at 80.2 °C, 0.604 at 90.5 °C (shake flask-GC, Stephenson and Stuart, 1986) Vapor density: 4.75 g/L at 25 °C, 4.01 (air = 1) Vapor pressure (mmHg): 10 at 20 °C (NIOSH, 1997) Environmental fate: Photolytic. The rate constant for the reaction of sec-butyl acetate and OH radicals in the atmosphere at 300 K is 3.4 x 10-12 cm3/molecule⋅sec (Hendry and Kenley, 1979). Chemical/Physical. Slowly hydrolyzes in water forming sec-butyl alcohol and acetic acid. Exposure limits: NIOSH REL: TWA 200 ppm (950 mg/m3), IDLH 1,700 ppm; OSHA PEL: TWA 200 ppm; ACGIH TLV: TWA 200 ppm (adopted). Symptoms of exposure: Exposure to vapors may cause irritation to eyes and respiratory passages (Patnaik, 1992). Uses: Solvent for nitrocellulose lacquers; nail enamels, thinners; leather finishers.
