Registration Dossier
Registration Dossier
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EC number: 233-060-3 | CAS number: 10026-13-8
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
Two studies of acute aquatic toxicity performed with the degradation product hydrochloric acid are available. Infact, Phosphorus pentachloride degrades rapidly in water to form hydrochloric acid and phosphoric acid. The degradation products of phosphorus pentachloride will dissociate in aqueous conditions with the formation of the environmentally ubiquitous ionic species H+, Cl- and phosphate, therefore in can be predicted that the effects of the substance will be indirect and due to pH (acidification) rather than direct. The hazard of hydrochloric acid for the environment is caused by the proton (pH effect). For this reason the effect of hydrochloric acid on the organisms depends on the buffer capacity of the aquatic ecosystem. Latest dossier for registration of HCl on ECHA website reports lower values for acute aquatic toxicity (Invertebrates and algae).
Conclusion on classification
Phosphorus pentachloride immediately dissociates in water. The assessment of environment toxicity is based on toxicity of hydrochloric acid, which is the most dangerous degradation product. The effect of hydrochloric acid depends on pH effect caused by the proton. For this reason no classification is required.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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