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Ecotoxicological information

Toxicity to microorganisms

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Link to relevant study record(s)

Description of key information

Read-across from analogue substances.
Alcamizer 5 (EC 422-150-1):
No significant inhibition in respiration rate of the sludge (>10%) was recorded at 100 mg ALCAMIZER 5/L. The duplicate measurement
confirmed the result of the first measurement. Study performed according to OECD 209 and GLP guidelines.
Aluminium-magnesium-zinc-carbonate-hydroxide (EC 423-570-6):
No significant inhibition in respiration rate of the sludge was recorded at 100 mg substance/L in a OECD 209 test performed according to GLP
principles.
Overall conclusion: 30 min EC50 > 100 mg/L (> solubility limit in water)

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
100 mg/L

Additional information

Based on reliable studies with Alcamizer 5 and Aluminium-magnesium-zinc-carbonate-hydroxide, both analogue substances,

[carbonato(2-)]hexadecahydroxybis(aluminium)hexamagnesium is considered to have no inhibitory effect on the microorganisms of a water treatment plant at loading rates of 100 mg/L.