Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 947-842-3 | CAS number: -
The ready biodegradability was determined with a non adapted activated sludge for the test item over a period of 28 days in the Modified Sturm Test. The test item was tested with a concentration of 50 mg/L in duplicates, corresponding to a carbon content (TOC) of 12.4 mgC/L in the test vessels. The biodegradation of the test item was followed by titrimetric analyses of the quantity of CO2 produced by the respiration of bacteria. The degradation was finished on day 28 by acidification; the last titration was made on day 29. The percentage Co2 production was calculated in relation to the theoretical CO2 (ThCo2) of the test item. The biodegradation was calculated for each titration time.
To check the activity of the test system sodium acetate was used as functional control. The percentage degradation of the functional control reached the pass level of 60 % after 8 days. In the toxicity control containing both test and reference item a biodegradation rate of 82 % occurred within 14 days and came to a maximum of 100 % after 28 days. The test item in the toxicity control did not inhibit the biodegradation of the reference item.
The test item reached the 10 % level (beginning of biodegradation) after an adaptation phase of 4 days. The biodegradation was rapid and reached the pass level of 60 % already on day 10. The biodegradation came to a maximum of 100 % after 21 days.
The test item is readily biodegradable in 10 -d window 86 % and after 28 d (88%)
Table 1: Biodegradation of reference and test substance in % DOC removal throughout the test period of 28 days
In a toxicity test containing both the test item and the reference item >25% biodegradation was achieved within 14d and 84% after 28d. This means that the test item is not inhibitory.
The biodegradability of the test item Hostapon SG (24,6% a.i. SCG) was investigated in an OECD 301B ready test with non-adapted inoculum over a period of 28d. The initial test item concentration was 108 mg/L. 83 -86% Biodegradation was achieved after 28d. The 10% level of degradation was reached after 1.5d and the 60% pass level after 8d. In a toxicity test with the reference substance sodium benzoate it was demonstrated that the test item in not inhibitory.
Based on the results given before the test item Hostapon SG is readily biodegradable fulfilling the 10d window.
In three studies with two different supporting substances (structural analogue or surrogate) ready biodegradability could be shown in the 10 -d windows and after the 28 day period.
In a Key study with the test item it could be shown that the test item reached the 10 % level (beginning of biodegradation) after an adaptation phase of 4 days. The biodegradation was rapid and reached the pass level of 60 % already on day 10. The biodegradation came to a maximum of 100 % after 21 days.
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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Close Do not show this message again