ABSTRACT
CASRN: 108-94-1; DOT: 1915; DOT label: Flammable liquid; molecular formula: C6H10O; FW: 98.14; RTECS: GW1050000; Merck Index: 12, 2795 Physical state, color, and odor: Clear, colorless to pale yellow, oily liquid with a peppermint-like odor. Experimentally determined detection and recognition odor threshold concentrations were identical: 480 µg/m3 (120 ppmv) (Hellman and Small, 1974). Melting point (°C): -16.4 (Weast, 1986) -32.1 (Windholz et al., 1983) -47 (Aldrich, 1990) Boiling point (°C): 156.7 (BASF, 1998) Density (g/cm3): 0.9478 at 20 °C (Weast, 1986) 0.9412 at 25.00 °C (Aralaguppi et al., 1999) 0.93758 at 30.00 °C (Venkatesu and Rao, 1996) 0.9323 at 35.00 °C (Nayak et al., 2003) Diffusivity in water (x 10-5 cm2/sec): 0.87 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): 35.2 (NIOSH, 1997) 44.0 (BASF, 1998) Lower explosive limit (%): 1.1 at 100 °C (NIOSH, 1997) Upper explosive limit (%): 9.4 (NFPA, 1984) Henry’s law constant (x 10-5 atm⋅m3/mol): 1.2 at 25 °C (Hawthorne et al., 1985) 6.92 at 60.00 °C, 10.7 at 70.00 °C, 16.4 at 80.00 °C (headspace-GC, Hovorka et al., 2002) Interfacial tension with water (dyn/cm): 3.9 at 25 °C (quoted, Freitas et al., 1997)
9.14 ± 0.01 (Franklin et al., 1969) Soil organic carbon/water partition coefficient, log Koc: Unavailable because experimental methods for estimation of this parameter for alicyclic ketones are lacking in the documented literature. However, its high solubility in water suggests its adsorption to soil will be nominal (Lyman et al., 1982). Octanol/water partition coefficient, log Kow: 0.81 (quoted, Leo et al., 1971) 0.90 (shake flask-GLC, Park and Park, 2000) Solubility in organics: Soluble in acetone, alcohol, benzene, chloroform, and ether (Weast, 1986) Solubility in water: 15 g/L 10 °C, 50 g/L at 30 °C (quoted, Windholz et al., 1983) 23 g/L at 20 °C, 24 g/L at 31 °C (quoted, Verschueren, 1983) In wt %: 13.7 at 0 °C, 11.5 at 9.8 °C, 9.7 at 19.5 °C, 8.2 at 29.8 °C, 7.5 at 40.1 °C, 7.0 at 50.2 °C,
6.7 at 60.5 °C, 6.5 at 71.1 °C, 6.8 at 80.2 °C, 6.9 at 90.7 °C (shake flask-GC, Stephenson, 1992) Vapor density: 4.01 g/L at 25 °C, 3.39 (air = 1) Vapor pressure (mmHg): 4 at 20 °C, 6.2 at 30 °C (quoted, Verschueren, 1983) 5 at 20 °C (NIOSH, 1997) 4.5 at 25 °C (Banerjee et al., 1990) Environmental fate: Biological. In activated sludge inoculum, 96.0% COD removal was achieved. The average rate of biodegradation was 30.0 mg COD/g⋅h (Pitter, 1976). Photolytic. Atkinson (1985) reported an estimated photooxidation rate constant of 1.56 x 10-11 cm3/molecule⋅sec for the reaction of cyclohexanone and OH radicals in the atmosphere at 298 K. Chemical/Physical. Cyclohexanone will not hydrolyze because it has no hydrolyzable functional group. At an influent concentration of 1,000 mg/L, treatment with GAC resulted in effluent concentration of 332 mg/L. The adsorbability of the carbon used was 134 mg/g carbon (Guisti et al., 1974). Similarly, at influent concentrations of 10, 1.0, 0.1, and 0.01 mg/L, the GAC adsorption capacities were 36, 6.2, 1.1, and 0.19 mg/g, respectively (Dobbs and Cohen, 1980). Exposure limits: NIOSH REL: TWA 25 ppm (100 mg/m3), IDLH 700 ppm; OSHA PEL: TWA 50 ppm (200 mg/m3); ACGIH TLV: TWA 25 ppm (adopted). Symptoms of exposure: May irritate eyes and throat. Contact with eyes may cause cornea damage (Patnaik, 1992). An irritation concentration of 100.00 mg/m3 in air was reported by Ruth (1986). Toxicity: EC50 (48-h) and EC50 (24-h) values for Spirostomum ambiguum were 442 mg/L (NałeczJawecki and Sawicki, 1999).
