ABSTRACT
Note: Acrylamide may contain the following impurities: acetamide, acrylic acid, acrylonitrile, copper, formaldehyde, hydroquinone, methylacrylamide, hydroquinone monomethyl ether, peroxide, propanamide, and sulfate. When acrylamide is produced using a copper catalyt, copper salts may be added to aqueous solutions at concentrations >2 ppm (NICNAS, 2002). Commercial solutions 30-50%) are usually inhibited with copper salts to prevent polymerization. In addition, solutions containing oxygen will prevent polymerization. CASRN: 79-06-1; DOT: 2074; DOT label: Poison; molecular formula: C3H5NO; FW: 71.08; RTECS: AS3325000; Merck Index: 12, 131 Physical state, color, and odor: Colorless, odorless solid or flake-like crystals which sublime slow at room temperature. Melting point (°C): 84-85 (Weast, 1986) Boiling point (°C): 125 at 25 mmHg (Windholz et al., 1983) Density (g/cm3): 1.05 at 25 °C (CHRIS, 1984) 1.122 at 30 °C (Windholz et al., 1983) Diffusivity in water (x 10-5 cm2/sec): 1.49 at 30 °C using method of Hayduk and Laudie (1974) Flash point (°C): 137 (NIOSH, 1994) Henry’s law constant (x 10-9 atm⋅m3/mol): 3.03 at 20 °C (approximate - calculated from water solubility and vapor pressure) Ionization potential (eV): 9.5 (Lias et al., 1998) Soil organic carbon/water partition coefficient, log Koc: Experimental methods for estimation of this parameter for amides are lacking in the documented literature, however, an estimated value of -0.989 was reported by Ellington et al. (1993). Its high solubility in water and low Kow values suggest that acrylamide adsorption to soil will be nominal (Lyman et al., 1982). This is in agreement with the findings of Brown et al. (1980). These investigators concluded that owing to the neutral hydrophilic nature of acrylamide, no significant adsorption was observed when various adsorbents were used including natural sediments, clays, peat, sewage sludge, cationic and anionic resins.
