Registration Dossier
Registration Dossier
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EC number: 918-594-3 | CAS number: 7723-14-0
Additional physico-chemical information
Administrative data
Link to relevant study record(s)
Description of key information
Properties regarding explosiviness of a dust / air mixtures
Minimum ignition energy of red phosphorus dust cloud is about 0.2 to 1 mJ.
Minimum ignition temperature of a surface in contact with a dust cloud of untreated red phosphorus is 100°C and might be higher for stabilized commercial grades (f.e. 400°C)
Limiting oxygen concentration for an unstabilized red phoshorus is below 0.11 Vol% oxygen and might be higher for stabilized commercial grades (f.e. below 0.11 Vol%)
dustexplosion could be observe at least in concentration of 30g/m³ up to 1000g/m³
Properties of loose heaped powder
Minimum ignition energy of loose heaped red phosphorus powder is about 0.01 to 0.1 mJ.
Additional information
Properties regarding explosiviness of a dust / air mixtures
Dust clouds of red phosphorus powder in air are highly explosive with a high maximum rate of pressure rise and can be ignited with very small energies over a broad concentration range and even with very small oxygen concentration. The data requesting serious selection of protective measures by handling of this powder ( see IUCID chapter 12and CSR chapter 6.5). The properties differ with the origin of the red phosphorus and are worst for unstabilized red phosphorus.
Loose heaped red phosphorus powder can be ignited by very small ignition energies; corresponding to the minimum ignition energy for acetylene-air mixtures. Energy sufficient to ignite it can be for example the application by shock, friction or electrostatic sparking.
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