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: -
Endpoint summary
Administrative data
Description of key information
Additional information
Four ecotoxicilogical tests concerning the aqatic toxicity were performed according to the official EU methods stated in the Council Regulation (EC) No. 440/2008, published in O.J.L 142, 2008, resp. in Commission Regulation (EC) No. 761/2009.
Experimental results are available for:
1/ Fish (Poecilia reticulata)
2/ Invertebrates (Daphnia magna)
3/ Algae (Desmodesmus subspicatus)
4/ Microorganisms (activated sludge of a predominantly domestic sewage)
Acute toxicity testing in fish, daphnia and algae indicate a low order of toxicity with effect concentrations > 100 mg/L (nominal concentration).
The following results were obtained in acute tests:
1/ Fish (Poecillia reticulata): LL50 (96 hours) > 100 mg/L
2/ Daphnia magna: EL50 (48 hours) > 100 mg/L
3/ Algae (Desmodesmus subspicatus): ErL50 (72 hours) and EyL50 (72 hours) > 100 mg/L
Respiration of activated sludge is not inhibited at the test substance concentration > 1000 mg/L.
The substance - Reaction product of Distillates (petroleum), acid-treated heavy naphthenic and calcium oxide - can be considered as the substance with no toxic or harmful effects.
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