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EC number: 237-600-9 | CAS number: 13863-31-5
EC50 (3 h) > 1000 mg/l (nominal, act. ingr.)
The determination of the inhibition of oxygen consumption in the activated sludge was performed in a 3-hours test with the CAS 13863 -31 -5, according to the OECD guideline 209. The concentration tested were 1000, 500, 250, 125, 62.5 mg/l based on active ingredient of the test substance, which equate to a nominal test concentration of 1333, 667, 333, 167 and 83.3 mg/l. The EC50 at 3 hours was stated as greater than 1000 mg/l (nominal, act. ingr.) (BASF SE, 2015).
Three further studies on the analogue substance CAS 4193-55-9 are available in order to assess the toxicity of the substance to microorganisms, but each of them presents some lacking: in two of them a water solution with 20 % of the substance was tested and for the third one just the summary is available.
The RCC - Umweltchemie GmbH & Co. study (1993) can be considered as the most reliable, since even if the tested substance concentration is low, the test was performed at 1000 mg/l, with no inhibitory effect. This set the result at > 200 mg/l, calculated on the substance effective concentration.
As a supporting study a reliable test performed on the similar substance CAS 16470-24-9, was also reported. Detailed justification for Read Across is reported within the endpoint and in the category Justification Report attached to section 13 of this dossier.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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