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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

Schaefer, E. C. and Siddiqui, A. I. (2003). Hexabromocyclododecane (HBCD): An activated sludge respiration inhibition test. Report no.: 439E-108A. Report date: 2003-08-20.

Key value for chemical safety assessment

EC50 for microorganisms:
15 mg/L

Additional information

HBCDD did not inhibit the respiration of activated sludge at 15 mg/L. Thus, the NOEC was >15 mg/L, the highest concentration tested.