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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

96 h LC50 130 mg active acid/L, S. maximus, reliability 2 (AnalyCen 2002a)

Key value for chemical safety assessment

Marine water fish

Marine water fish
Effect concentration:
130 mg/L

Additional information

A 96h LC50 value of 300 mg/L test substance, equivalent to 130 mg active acid/L, have been reported for the effects of the test substance on the mortality of the marine fish Scopthalamus maximus. 100% mortalities were recorded in the highest test concentration (1000 mg/L test substance) but these are thought to relate to the low pH recorded, pH 3.6, rather than reflecting the true toxicity of the test substance. No data are available on the short-term toxicity of BHMT (CAS 34690-00-1) with freshwater fish, therefore the 96h LC50 value from the marine exposure of BHMT to S. maximus is used as the freshwater key value for chemical safety assessment.