Red phosphorus does not ignite in air at temperatures below 240 °C, whereas pieces of white phosphorus ignite at about 30 °C hope it helps! Office of Response and Restoration, Examsbook.com is your ultimate one stop haven of knowledge. Lower Explosive Limit (LEL): data unavailable, Upper Explosive Limit (UEL): data unavailable, Vapor Density (Relative to Air): data unavailable, National Oceanic and Atmospheric Administration. Skin: Wear appropriate personal protective clothing to prevent skin contact. When the carbon disulfide evaporated, the phosphorus would burst into flames, and probably also ignite the highly flammable carbon disulfide fumes. However the ignition temperature is much higher (260 °C compared to 30 °C for white phosphorus). It is insoluble in carbon(IV)sulphide, water and most common organic solvents. The composition of S355 is Carbon - 0.23% max Manganese - 1.60% max Silicon - 0.50% max Sulfur - 0.05% max Phosphorus 0.05% max, Copper - 0.55% max Nitrogen - … PHOSPHORUS, WHITE, DRY OR UNDER WATER OR IN SOLUTION, PHOSPHORUS, YELLOW, DRY OR UNDER WATER OR IN SOLUTION. This was a simple, light, portable weapon of great power, equivalent to a 105 mm howitzer, but of lesser range. It is generally mixed with rubber or polystyrene to slow down the burning. The phosphorus sticks to whatever it hits, burns, and if what it has hit is combustible, sets it on fire. Burns readily. White phosphorus will ignite at about 35 C, slightly above room temperature. Often ignites on contact with air; storage under water prevents this reaction. "White phosphorus (P4) is the elemental form of phosphorus used in smoke munitions. (emphasis added), During the Vietnam War, the "White Phosphorus (WP), M110, was also used as a marker round. Contact lenses should not be worn when working with this chemical. The red allotropic form of this element has a higher density than white phosphorus. [4], "White phosphorus is both a smoke producer and a particularly nasty incendiary agent, known as WP. Cool, saturated soils with no open pore spaces are also very effective in preventing the sublimation and ignition of P4. "It is commonly believed that white phosphorus ignites spontaneously on contact with air at room temperature. The cylindrical round was simply dropped down the tube, and it sailed away on a high trajectory. Solid or liquid causes severe burns of skin. It is not soluble in water but is soluble in carbon disulphide. Other common names include WP and the slang term "Willie Pete" or "Willie Peter" derived from William Peter, the World War II phonetic alphabet for … It was widely used in World War I in grenades and trench mortar rounds to screen troop movements. Add your answer and earn points. 1946-47]. Often ignites on contact with air; storage under water prevents this reaction. 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