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Ecotoxicological information

Long-term toxicity to fish

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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.