Registration Dossier
Registration Dossier
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EC number: 940-436-7 | CAS number: 1354632-48-6
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Median inhibitory concentration, EC50: > 1000 mg/L
No effect concentration, NOEC: ca 420 mg/L
Threshold concentration of complete inhibition, EC80: >> 1000 mg/L
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
- EC10 or NOEC for microorganisms:
- 420 mg/L
Additional information
The inhibition of biogas production from anaerobic digestion of sludge was measured in the presence of Remazol Goldgelb RNL. The test was carried out at concentrations of 100, 400, 700, and 1000 mg/L test material. The anaerobic biogas generation is detected by the determination of pressure in the individual approach. The inhibition of gas formation in the presence of the test material is compared with untreated controls as a measure of the toxic effect of the sample to the bacteria.
The following inhibition was measured at the respective test substance concentrations:
| Concentration [mg/L] | inhibition [%] |
| 1000 | 29 |
| 700 | 22 |
| 400 | 9 |
| 100 | 4 |
The EC50 of Remazol Goldgelb RNL for the inhibition of anaerobic organisms of activated sludge is more than 1000 mg/L
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