Registration Dossier
Registration Dossier
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Reaction product of Crude sludge and Calcium oxide. Crude sludge is the mixture of by-products of petroleum hydrocarbons refining (especially Total petroleum hydrocarbons, Polycyclic aromatic hydrocarbons, acid-refined heavy petroleum distillates). The Crude sludge is neutralised by calcium oxide in the ratio 80:20. The maturing process proceeds under ambient conditions and takes for at least 3 days. Subsequently, the reaction product is processed mechanically.
EC number: 930-592-4 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Method C.11 - Activated Sludge Respiration Inhibition Test, Council Regulation (EC) No. 440/2008, published in O.J.L 142, 2008.
GLP study
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
Additional information
Results of the respiration inhibition test:
On the basis of the effective concentrations describing the respiration inhibition of activated sludge caused by the test substance the EC50 was found to be:
EC50 > 1000 mg/L
Under the current experimental conditions, all tested concentrations in the main test provided no significant inhibition of respiration rate. Therefore it was not possible to calculate the EC50 value.
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