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Ecotoxicological information

Toxicity to microorganisms

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Link to relevant study record(s)

Description of key information

An activated sludge respiration inhibition test was conducted according to GLP and OECD Guideline 209 on the chemical NaDMH. Based on the results of a range-finding test a 'limit' test was conducted at nominal concentrations of  1.0, 10, 100 and 1000 mg/L. The 3-hour EC50 was 2200 mg/L and NOEC = 320 mg/L.
An activated sludge respiration inhibition test was conducted according to GLP and OECD Guideline 209 on the analogue chemical DMH, the results of which are included here for supporting read-across purposes.
Based on the results of a range-finding test a 'limit' test was conducted at a nominal concentration of 1000 mg/L. The 3 hour EC50 was > 1000 mg/L and NOEC = 1000 mg/L

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
320 mg/L

Additional information

As previously stated one of these studies has been performed on DMH (Dimethyl Hydantoin) and has been used for read-across purposes. A summary of data for read-across of NaDMH with DMH is given in Section 13.