ABSTRACT
CASRN: 91-59-8; DOT: 1650; DOT label: Poison; molecular formula: C10H9N; FW: 143.19; RTECS: QM2100000; Merck Index: 13, 6486 Physical state and color: White crystals becomes purplish-red on exposure to air. Odor threshold concentrations ranged from 1.4 to 1.9 mg/m3 (quoted, Keith and Walters, 1992). Melting point (°C): 113 (Weast, 1986) Boiling point (°C): 306.1 (Weast, 1986) Density (g/cm3): 1.0614 at 98 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.67 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: 4.11 (Dean, 1973) Flash point (°C): 158.5 (NIOSH, 1997) Henry’s law constant (x 10-9 atm⋅m3/mol): 2.01 at 25 °C (quoted, Mercer et al., 1990) Ionization potential (eV): 7.1 (Lias, 1998) Soil organic carbon/water partition coefficient, log Koc: 2.11 (calculated, Mercer et al., 1990) Octanol/water partition coefficient, log Kow: 2.40 (quoted, Sangster, 1989) Solubility in organics: Soluble in alcohol and ether (Weast, 1986) Solubility in water: 0.002 wt % at 20 °C (NIOSH, 1997)
10,000 at 108.6 °C (NIOSH, 1997) 2.56 at 20-30 °C (quoted, Mercer et al., 1990) Environmental fate: Photolytic. Low et al. (1991) reported that the photooxidation of aqueous primary amine solutions by UV light in the presence of titanium dioxide resulted in the formation of ammonium and nitrate ions. Chemical/Physical. Kanno et al. (1982) studied the aqueous reaction of 2-naphthylamine and other substituted aromatic hydrocarbons (aniline, toluidine, 1-naphthylamine, phenol, cresol, pyrocatechol, resorcinol, hydroquinone, and 1-naphthol) with hypochlorous acid in the presence of ammonium ion. They reported that the aromatic ring was not chlorinated as expected but was cleaved by chloramine forming cyanogen chloride. At lower pHs, the amount of cyanogen chloride formed increased (Kanno et al., 1982). 2-Naphthylamine will not hydrolyze because it does not contain a hydrolyzable functional group (Kollig, 1993). At influent concentrations of 10, 1.0, 0.1, and 0.01 mg/L, the GAC adsorption capacities were 300, 150, 75, and 37 mg/g, respectively (Dobbs and Cohen, 1980). Exposure limits: Potential occupational carcinogen. Given that no standards have been established, NIOSH (1997) recommends the most reliable and protective respirators be used, i.e., a self-contained breathing apparatus that has a full facepiece and is operated under positive-pressure or a supplied-air respirator that has a full facepiece and is operated under pressure-demand or under positive-pressure in combination with a self-contained breathing apparatus operated under pressure-demand or positive-pressure. OSHA recommends that worker exposure to this chemical is to be controlled by use of engineering control, proper work practices, and proper selection of personal protective equipment. Specific details of these requirements can be found in CFR 1910.1003-1910.1016. Symptoms of exposure: Ingestion, skin contact, or inhalation of vapors can cause acute hemorrhagic cystitis, respiratory stress, and hematuria (Patnaik, 1992). Toxicity: Acute oral LD50 for rats 727 mg/kg (quoted, RTECS, 1985). LD50 (intraperitoneal) for mice 200 mg/kg (quoted, RTECS, 1985). Uses: Manufacture of dyes and in rubber.
