Chemical Properties
Pure product is white crystalline solid, slightly minty aroma. m.p. 175°C, relative density 1.33, vapor pressure 5.33×10-4Pa (25°C). Solubility is 15.8% in methanol, 1.2% in ethanol, 0.14% in xylene amide, 0.04% in benzene, 0.03% in acetone, 0.02% in n-hexane, 0.004% in chloroform and 179% in water. It can be decomposed by acid, strong alkali and calcium, magnesium salts, decompose above 80℃ and release ammonia, half-life in soil is about 7d, slightly corrosive to brass.
Uses
FOSAMINE AMMONIUM used to control many woody and brush species on noncrop land
Safety Profile
Mildly toxic by ingestion andinhalation. When heated todecomposition it emits very toxic fumes of NOx, POx, andNH3.
Environmental Fate
Soil. Fosamine is rapidly degraded to carbon dioxide by microorganisms in soil (Humburg et al., 1989). The reported half-life in soil is approximately 7 to 10 days (Hartley and Kidd, 1987; Worthing and Hance, 1991).
Plant. After a 2.5% application to multiora rose plant leaves, 19, 21, 22, and 43% of the applied amount was absorbed after 1, 4, 8, 16 and 32 days, respectively (Mann et al., 1986). Degrades rapidly in plants with a half-life of 2 to 3 weeks (H
Chemical/Physical. Fosamine-ammonium is stable as a dilute solution but decomposes in weak acidic media (Worthing and Hance, 1991), probably forming water-soluble salts.
