ABSTRACT
CASRN: 479-45-8; DOT: 0208; DOT label: Class A explosive; molecular formula: C7H5N5O8; FW: 287.15; RTECS: BY6300000; Merck Index: 12, 6664 Physical state and color: Colorless to pale yellow crystals Melting point (°C): 131-132 (Weast, 1986) Boiling point (°C): Explodes at 187 (Weast, 1986) Density (g/cm3): 1.57 at 10 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.64 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): Explodes (NIOSH, 1997) Entropy of fusion (cal/mol⋅K): 13.6 (Krien et al., 1973) Heat of fusion (kcal/mol): 5.4803 (Krien et al., 1973) 6.1798 (Hall, 1971) Henry’s law constant (x 10-3 atm⋅m3/mol): <1.89 at 20 °C (approximate - calculated from water solubility and vapor pressure) Soil organic carbon/water partition coefficient, log Koc: 2.37 using method of Kenaga and Goring (1980) Octanol/water partition coefficient, log Kow: 2.04 using method of Kenaga and Goring (1980) Solubility in organics: Soluble in acetone, benzene (Weast, 1986), glacial acetic acid, ether (Windholz et al., 1983), and toluene
0.02 wt % at 20 °C (NIOSH, 1997) Vapor pressure (mmHg): <1 at 20 °C (NIOSH, 1997) Environmental fate: Chemical/Physical. Produces highly toxic nitrogen oxides on decomposition (Lewis, 1990). Exposure limits (mg/m3): NIOSH REL: 1.5, IDLH 750; OSHA PEL: TWA 1.5; ACGIH TLV: TWA 1.5 (adopted). Uses: As an indicator in analytical chemistry; as a booster in artillery explosives.
