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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

Acutely harmful to fish.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Dose descriptor:
LC50
Effect concentration:
52 mg/L

Marine water fish

Marine water fish
Dose descriptor:
LC50
Remarks:
TLm
Effect concentration:
89 mg/L

Additional information

In order to assess the acute toxicity to fish, experimental data are available for the source substance CAS 75-56-9.

A GLP-compliant guideline study (EPA-660/3-75-009) is available for propylene oxide, reporting a 96 h LC50 value of 52 mg/L in the freshwater species Salmo gairdneri (new name: Oncorhynchus mykiss) (Shell Research Ltd., 1986). The only saltwater species reported is the common mullet (Mugil cephalus) which shows a similar sensitivity to the freshwater species, having a 96 h LC50 of 89 mg/L (Crews, 1974). Therefore, based on the available read-across data for the structurally similar substance CAS 75 -56 -9, it can be concluded that ethylene is with hight probability acutely harmful to fish.