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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Long-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

The Maximum Acceptable Toxicant Concentration (MATC) for 2-mercaptobenzothiazole (MBT) in an early-life stage test on rainbow trout was determined to be 0.041 - 0.078 mg/l within 89 days. The concentration of 0.078 mg/l was reported as LOEC and 0.041 mg/l as NOEC (CMA, 1989).

Key value for chemical safety assessment

Additional information

There is no direct data available regarding the chronic effect of MBS on fish. As hydrolysis product of MBS, MBT has a long-term study available for fish and hence a read-across approach is used to support the toxicity discussion regarding MBS.