Registration Dossier
Registration Dossier
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EC number: 206-768-5 | CAS number: 373-61-5
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
In contact with water, acetic acid - boron trifluoride rapidly decomposes to form acetic acid and boron trifluoride dihydrate. The PBT assessment was consequently based on the properties of the hydrolysis products.
In contact with water, dihydrogen bis(acetato)difluoroborate rapidly decomposes to form acetic acid 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 trifluorideis classified as R48.
In conclusion Boron trifluoride does not fulfil the PBT/vPvB criteria.Concerning acetic acid, the substance is readily biodegradable in water and therefore not persistent or very persistent. It is not bioaccumulative as demonstrated by a log Kow of -0.17, which is lower than the screening criteria. On the basis of this screening assessment acetic acid is not considered to be bioaccumulative (B) or very bioaccumulative (vB). Due to the results of the aquatic toxicity studies and the relevant mammalian toxicity studies, the substance is not toxic (not T).In conclusion acetic acid does not fulfil the PBT/vPvB criteria.- Likely routes of exposure:
Because the substance does not fulfill the PBT and vPvB criteria, no emission characterisation is performed.
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