phosphorus white red

  • Red phosphorus | chemistry | BritannicaDiese Seite übersetzen

    25.03.2020 · .a polymeric form called "red phosphorus." This substance is amorphous when formed at lower temperatures, but it can become crystalline, with a melting point of about 590° C (1,090 °F). At higher temperatures and pressures, or with the aid of a catalyst, at ordinary pressures and a ...

  • Phosphorus | Office of Environmental Health and .Diese Seite übersetzen

    Yellow phosphorus (white phosphorus) is a significantly more hazardous form of the element and may be present as a contaminant in red phosphorus. This allotrope of phosphorus is extremely toxic and the estimated human lethal dose is 50 - 100 mg.

  • What Is Red Phosphorus? | SciencingDiese Seite übersetzen

    What Is Red Phosphorus? ... He put white phosphorus in a flask that contained nitrogen and heated it to around 482 degrees F for a few hours. Function. Red phosphorus is used in the production of semiconductors, pyrotechnics, fertilizers, ...

  • Red Phosphorus - Structure, Properties, .Diese Seite übersetzen

    Red phosphorus is odorless and has a deep red color. It is not poisonous to humans, in contrast to the white phosphorus allotrope. Upon heating to temperatures above 300 o C, red phosphorus undergoes crystallization. It can also assume a cubic structure in its crystal lattice.

  • Phosphorus, red | CAS No. 7723-14-0 | Sigma .Diese Seite übersetzen

    Red phosphorus is the most common allotrope of phosphorus. It exists in an amorphous form and found to be more stable than white phosphorus. It is used in organic synthesis and chemical warfare including igniters, incendiaries, screening smoke ammunition and smoke signal.

  • Phosphorus - Gilmour - - Major Reference Works - .Diese Seite übersetzen

    White phosphorus is charged to a closed mill and scavenged with nitrogen, heated to 100–180 °C to remove water, then sealed and heated to 350–590 °C for several hours to convert, allowed to cool, and then flooded with water and wet ground to produce a fine slurry of red P. Sodium hydroxide solution is added to decompose any remaining ...

  • Phosphorus - Simple English Wikipedia, the free .Diese Seite übersetzen

    White phosphorus catches fire spontaneously in air, burning to make smoke of phosphorus(V) oxide. If it burns in a little air, it produces poisonous phosphorus(III) oxide. When white phosphorus is heated in an alkali, it disproportionates to produce hypophosphites and phosphine. Red phosphorus can burn but needs to be ignited.

  • Phosphorus - WikipediaDiese Seite übersetzen