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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The reported 96 hour LC50 for Oncorhynchus mykiss was 0.58 mg/L.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
0.58 mg/L

Additional information

The study conducted by SRTC (1996) was GLP compliant and followed standard guidelines. This study reported 96 hour LC50 for Oncorhynchus mykiss was 0.58 mg/L. Suitable precautions were implemented to take into account the volatility of 2,4,4 -trimethylpentene.

The short-term aquatic toxicity to this substance was estimated using the Target Lipid Model based on methologies described by Mcgrath et al. (2004). The estimated LL50 for this substance is 0.778 mg/L.