Phosphine

CAS RN: 7803-51-2
UN/NA: 2199

Exposure Summary

Phosphine's production as a by-product from the storage of ferrous alloys and phosphide hydrolysis may result in its release to the environment through various waste streams. Phosphine's use as an insecticide or rodenticide will result in its direct release to the environment. Phosphine is formed when other fumigants (aluminum phosphide, magnesium phosphide, calcium phosphide, zinc phosphide) degrade. Phosphine gas is produced in the degradation of phosphate containing organic sources and can be generated in sediments, soils, sludge and water. If released to air, phosphine will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; and has a reported atmospheric half-life of 5 hours. Phosphine will dissipate rapidly from soil and water surfaces. Studies have shown that sub-surface phosphine may bind to soil. Occupational exposure to phosphine may occur through inhalation and dermal contact with this compound at workplaces where phosphine is produced or used. Monitoring and use data indicate that the general population is not expected to be exposed to phosphine. (SRC)
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