Registration Dossier
Registration Dossier
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EC number: 233-046-7 | CAS number: 10025-87-3
Endpoint summary
Administrative data
Description of key information
Additional information
Stability in water (OECD SIDS, SIAM 19, Oct 2004)
Data on hydrolysis are available: According to Riess (2002) in water, phosphoryl trichloride hydrolyzes to phosphoric acid and hydrochloric acid with t1/2 < 10 seconds. Thus, an environmental impact of phosphoryl trichloride itself is not likely to occur. For assessment of its environmental effects the hazards of the hydrolysis products, phosphoric acid and hydrochloric acid, have to be assessed.
Any emission into water, air, or the terrestrial compartment would be affected by humidity and also results in the formation of the hydrolysis products.
Hydrochloric acid dissociates readily in water causing a pH shift which determines the impact of phosphoryl trichloride on aquatic life. The tolerance of water organisms towards pH is diverse. Recommended pH values for test species listed in OECD guidelines are between 6 and 9.
Phosphoric acid is of medium acidity (pKa = 2.1) and partly dissociates in water causing a pH shift.
Biodegradation (OECD SIDS, SIAM 19, Oct 2004)
Since phosphoryl trichloride hydrolyzes rapidly in water, no biodegradation can be measured. The hydrolysis products chloride, phosphate and hydrogen ions, are inorganic end products of biodegradation.
Bioaccumulation (OECD SIDS, SIAM 19, Oct 2004)
Since phosphoryl trichloride hydrolyzes rapidly in water, no BCF can be measured for phosphoryl trichloride. As the hydrolysis products chloride, phosphate and hydrogen ions, are generally present in the natural environment, and can be excreted by physiological mechanisms, any bioaccumulation is not expected.
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