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Organophosphorus chemistry is the scientific study of the synthesis and properties of organophosphorus compounds, which are organic compounds containing phosphorus. [1] They are used primarily in pest control as an alternative to chlorinated hydrocarbons that persist in the environment.
PBr 3 is prepared by treating red phosphorus with bromine. An excess of phosphorus is used in order to prevent formation of PBr 5: [1] [2] P 4 + 6 Br 2 → 4 PBr 3. Because the reaction is highly exothermic, it is often conducted in the presence of a diluent such as PBr 3. Phosphorus tribromide is also generated in situ from red phosphorus and ...
It is immediately south of the larger city and county seat of Fairmont, West Virginia. The city is also adjacent to the Tygart Valley River. According to the United States Census Bureau, the city has a total area of 3.41 square miles (8.83 km 2), of which 3.23 square miles (8.37 km 2) is land and 0.18 square miles (0.47 km 2) is water. [8]
Phosphate rich organic manure is a type of fertilizer used as an alternative to diammonium phosphate and single super phosphate.. Phosphorus is required by all plants but is limited in soil, creating a problem in agriculture In many areas phosphorus must be added to soil for the extensive plant growth that is desired for crop production.
Phase behavior Triple point? K (? °C), ? Pa Critical point: 271 K (−2 °C), 42.7 atm Std enthalpy change of fusion, Δ fus H o? kJ/mol Std entropy change
Melting points of the elements (data page) 4 languages. ... 15 P phosphorus (red) use: 870 K: 597 °C: 1107 °F CRC: tp 590 °C: LNG: 597 °C: 15 P phosphorus (black ...
The phosphorus cycle is the biogeochemical cycle that involves the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus, because phosphorus and phosphorus-based materials do not enter the gaseous phase readily, [1] as the main source of gaseous phosphorus ...
The Phosphoria includes phosphorite beds that are an important source of phosphorus. [5] Many of its shales are rich in organic matter and are petroleum source rocks, [6] and some of its dolomites include petroleum reservoirs. [7]