Registration Dossier
Registration Dossier
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EC number: 690-796-1 | CAS number: 420-16-6
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
In contact with water, acetonitrile - boron trifluoride rapidly decomposes to form acetonitrile and boron trifluoride dihydrate. The PBT assessment was consequently based on the properties of the hydrolysis products.
Both decomposition products do not fulfill the PBT/vPvB criteria.
- Boron trifluoride and its breakdown products are not expected to bioaccumulate in fish/earthworm tissues due to their high solubility and octanol-water partition coefficients which are quite low. Moreover due to the expected very short half-life in aqueous media (hydrolysis), boron trifluoride is not expected to be persistent in aquatic and terrestrial media. Considering all those elements one can safely conclude that secondary poisoning is not expected as birds and terrestrial top predators will not be exposed to boron trifluoride and its breakdown products via food consumption.
- Boron trifluoride and its breakdown products fulfil the Toxic criterion: concerning the aquatic compartment EC50 or LC50 > 0.1 mg/L and NOEC for mammals > 30 mg/kg food. However, boron trifluoride is classified as R48.
In conclusion, boron trifluoride does not fulfil the PBT/vPvB criteria.Concerning acetonitrile, the substance is identified to readily biodegradable and not bioaccumulative (due to LogKow < 3.0). In conclusion, acetonitrile does not fulfil the PBT/vPvB criteria.
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