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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

The short-term toxicity of hydrazine towards fish (Lebsistes reticulatus) is characterized by an LC50(96 h) of 0.61 mg/L (Slonim, 1977). Exposure concentrations were proved indirectly through testing adverse effects of an altered test solution containing hydrazine towards the test animals.

For hydrazine an EC50(48 h) of 0.175 mg/L (mean of two separate tests) was observed with respect to the immobilization of daphnids (Velte, 1984), whereas exposure concentrations were proved by analytical measurements.

The long-term toxicity of hydrazine towards invertebrates was investigated yielding a NOEC(21 d) of 0.010 mg/L having reproduction as most sensitive end point (Currenta, 2010b). The test evaluation was based on time-weighted means of the measured concentrations.

The adverse effects hydrazine towards the growth of aquatic algae are characterized by an ErC50(48 h) of 0.017 mg/L as well as a NOEC of 0.006 mg/L referring to the reduction of the growth rate (Currenta, 2009).

The toxicity of hydrazine towards microorganisms is characterized by an EC50(3 h) of 5.5 mg/L (nominal) testing the respiration rate of activated sludge (Currenta, 2010c).