Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Valid experimental data are available for the endpoints 6.1.1 - short-term toxicity to fish, 6.1.3 - Short-term toxicity to aquatic invertebrates, 6.1.5 - toxicity to aquatic algae and cyanobacteria and 6.1.7 - Toxicity to microorganisms. For the other endpoints obligatory for REACH, waiving arguments are used.


Short-term-toxicity to fish


The LC50 value of butyric acid will be calculated on basis of the LC50 for valeric acid (Mattson, 1976) using the respective molecular weights (88.11 and 102.13).


The 96-h LC50 for butyric acid is assessed to be 66.4 mg/L.