Registration Dossier
Registration Dossier
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EC number: 206-114-9 | CAS number: 302-01-2
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- PBT assessment does not apply
- Justification:
According to REACH regulation Annex XIII, the PBT/vBvP assessment does not apply to inorganic chemicals.
Nevertheless, the properties of Hydrazine have been evaluated as far as possible.
P-criterion: As hydrazine is purely inorganic, it cannot be degraded in sewage treatment plants. Nevertheless, hydrazine will be degraded in aqueous media in the presence of metal ions, organic matter, etc, whereas the degradation rate is determined by the sum of all these factors, rather than by one factor alone. Several studies are available investigating the stability of hydrazine in aqueous media of a varying composition. They were not able to determine an exact half live, but they provide evidence that the environmental half life of hydrazine in aqueous media will be below 24 h. Concludingly, the environmental half life of hydrazine in the aquatic compartment will be smaller than 40 days not fulfilling the P criterion.
B-criterion: Only an estimated value is available accounting for 3.16. Furthermore, based on the physico-chemical properties of hydrazine (high water solubility, low logKow) and the rapid degradation in water, an accumulation of hydrazine in biota can be excluded. B-criterion not fulfilled.
T-criterion: The T criterion is fulfilled based on a NOEC(algae) =0.006 mg/l and Carc. Cat 1b according to EU Regulation No. 1272/2008 (GHS).
Justification: A substance is identified as a PBT substance if it fulfils all three PBT criteria described above. P and B criteria are not fulfilled.
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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