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Ecotoxicological information

Sediment toxicity

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sediment toxicity: long-term
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:

Description of key information

According to REACH regulation Annex XI, a study is scientifically unjustified. Based on the Guidance Document R.7b (ECHA, 2008), substances that are potentially capable of depositing on or sorbing to sediments to a significant extent have to be assessed for toxicity to sediment-dwelling organisms.  The main property of a substance that triggers the assessment for the sediment compartment is the potential to adsorb or bind onto sediment, proposing a logKow of 3 as cut off value. With a logKow of -0.16, hydrazine has only a low potential to sorb on soil or sediment excluding the deposition on or sorption to sediments to a significant extent. Concluding, in the absence of a relevant exposure, the toxicity of hydrazine towards sediment-dwelling organisms does not need to be assessed.  

Key value for chemical safety assessment

Additional information